Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bbb944af501180a…

MALICIOUS

PDF

114.8 KB Created: 2021-06-28 02:25:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: 6fcfa11f07e0ea019813279b37a12eaf SHA-1: b655fca42fffe460b7c4e78252897ea452b3c450 SHA-256: 1bbb944af501180acf91609f78a60f0528c067a4b2da8f3ac9ffdc9922304435
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The PDF contains numerous links to external sites, many hosted on compromised WordPress upload directories, suggesting a link farm or redirection mechanism. The 'SE_CALLBACK_LURE' heuristic confirms the document's intent to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://fdscience.com/UPFILE/userfiles/files/17391990073.pdf In PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/1ed8b74a5c7860689d8825fb0f8c22e8/ginuxetumodexat.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/b7bf2048c5ae3e8ef32e5fd4d15d9011/kobovupomixagosokowitina.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/cd0d41a630ff6d25d211e8d0990b399a/narutufudes.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/xixusutomizun.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/demezukulaminif.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/17662592913.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/86970208885.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c93e3ed159---1554432091.pdfIn PDF document text
    • http://hotelsandmartin.cz/files/file/56972051372.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/fc91d19d2a132aeb0f80d580ec7fbd47/73018430655.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/ctvqu3q2sq2ikelp72s4mmkgrc/19918446498.pdfIn PDF document text
    • http://cesmclassof68cheyennewy.com/clients/82478/File/62174287019.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/surikefolajodukikikusip.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/id10llsoh1nkjpc2s2mon647dn/48865031949.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b48f59d21c6---tovujofunadanerusexubu.pdfIn PDF document text
    • https://atasuorganiktarim.com/upload/ckfinder/files/72201075260.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/a819f2a86392cb83a6fc2c36e25c0206/bokakenarotot.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/itqlio8m36vrc1532bqecvg6a9/fimolotejatukutubux.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16098aa34497ae---paropinepurekujekarub.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/33e25967d00afdfcb54e948277bf1358/48076841806.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16093f73d7d8d3---reziva.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/dolafifopufadozuxalo.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/79670461974.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/eb0a7c110e970c53170f6a4d842acace/zimezabesitemidoveredugo.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/movovufonewug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=north+cascades+vintage+aircraft+museumPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15766 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F7D 11020 bytes
SHA-256: fde8ef166f122debbc07f8264e95e7200b1127d411f0982a9dbda73807179eb0
font_02_sfnt_off000188c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188C8 22556 bytes
SHA-256: 71a3ae613ef7876e25a307cfc5283382fe8d0a2a7fee564c4f53714d999f037e

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