Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63c98228ad413e1…

MALICIOUS

PDF

87.4 KB Created: 2021-07-22 05:14:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1e292b7b38d165cd45abc2d7c99a3064 SHA-1: 6192c634fede82cf70aea437dccbe7e2c1a1cece SHA-256: a63c98228ad413e1333cc3e5517a3afb80887a13c6603030b3c819460ba811c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve to redirect users to malicious content or phishing pages, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ceebc2ffdd---43964542140.pdf In PDF document text
    • http://i-dron.cz/data/file/zabunimadajoxalav.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/04d3fef1d08d4a047d0edd32c213f232/97636159280.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/nedasuragokejudejepirax.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929e389dda8---17684202714.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/b0e42a4c8732918af0bcf1a7011d7c15/rowiluxuxa.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/b8d9f6ad3ee097c3df74cd2fe2b1418f/velabuvizar.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/clc04bq230k6knprabd6mdngi6/pixur.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160939f72ea415---64545253223.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/u82kv2noqmbdhj6lt3sn40pje5/kerux.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/86246684013.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/cb0a5f285b4db20395d9792fe0838f95/38158439462.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/378d9c2e608ae2e37e80e9cfcb07321b/sijijuwiji.pdfIn PDF document text
    • http://nfc.soo.jp/file/makemidimita.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4f8gfl8ntgehc7o74vuej5bpf0/gulalipunan.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/posadagemuzosij.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16086c971481cb---11818581521.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/e249d3800c374dd70315726bd1de3a74/30094940788.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/nulurememumigewinenolegu.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa0d32ffd3---48682641133.pdfIn PDF document text
    • http://moodyhighclassof70reunion.com/clients/2/24/24f6aee67edc386a60746049a176a33b/File/levebebijosofezagoros.pdfIn PDF document text
    • http://novichiha.ru/pic/file/75753738343.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=t+and+c+meaningPDF 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_off0000f1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F1 10144 bytes
SHA-256: cbe9d7ea0c8ea035111530f8b7946a12116cd4f70bbce59226b5b515d40d14c7
font_01_sfnt_off0001084c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084C 17356 bytes
SHA-256: 2a848959aba9091ba9baf0943d40249dc5117747fc95f75848b54d8fc2f0d879
font_02_sfnt_off0001359b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1359B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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