Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f8c55078689e7d…

MALICIOUS

PDF

88.7 KB Created: 2021-07-17 10:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 3df633e33bf2c1f18471458dfa59d83f SHA-1: bd9afe79b629233e78f8b509953f4e95e17d4774 SHA-256: 89f8c55078689e7d67738786238d3a0295d1b19aea89d883d41d565e451b66d2
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document employs a callback lure, instructing the user to call a number, and also suggests a password-protected archive handoff, a common technique to evade gateway scanning. While no scripts were directly extracted, the presence of numerous embedded URLs and the overall structure suggest it is part of a phishing campaign, likely involving a malicious second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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) 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://gz-theoutfit.com/UploadFiles/FCKeditor/20210613115102.pdf In PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/2fa25acdf160574db8ce4101cbcf1c39/58528869887.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16088789c5727a---40244551716.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/fikotijusimepolujiv.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c55b4531d7d---zoradogokusiju.pdfIn PDF document text
    • http://aci-immobilier-douai.fr/userfiles/files/59000257688.pdfIn PDF document text
    • https://tims.ro/ckfinder/userfiles/files/34714222614.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/99719638594.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c2cf50d21b9---menoweder.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160910520aea6c---41891973349.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c963b3c1d4a---makazadum.pdfIn PDF document text
    • https://tmtteks.com/files/lenafasofulirokowijiforom.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a074ba14fda---3429882029.pdfIn PDF document text
    • https://kaptenhoki.info/contents//files/41898669442.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/90dd90f3ef9d714d24994f4021ed66b7/77343397696.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/rs3e5pd9g2tsfufv5ib2mk5kob/wenawadafisiru.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/81580415073.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/68ef1a604e7dc5132f2e03cdc329bbf7/28432059670.pdfIn PDF document text
    • http://schs1968.com/clients/861610/File/ludonigex.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/17100139617.pdfIn PDF document text
    • https://ms01bet.net/contents//files/40103408607.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/jamemekujefixodegidezemad.pdfIn PDF document text
    • http://ddrwc.net/clients/869849/File/bubanuxuxe.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/denivepawewomudom.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/78927761423.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=rich+adopt+me+accounts+username+and+password+2020PDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D6 11208 bytes
SHA-256: 769e7fbaf095f8a43be545ad8467f5f1ae514072605a8e6cf22524bf939ba15f
font_01_sfnt_off00010f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F03 17376 bytes
SHA-256: b3125b4c2c570fff7098eb6d35aa703795657aa5706e5f6bfbdf800bda7d1bce
font_02_sfnt_off00013c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.