Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d01ec579d051570…

MALICIOUS

PDF

89.0 KB Created: 2021-03-11 02:21:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 901a3edb1da689a20d1d6b7c5a766b6e SHA-1: cac89b2a4cbc27b7f068585197dc37dafb113feb SHA-256: 7d01ec579d051570195ba53790dbcb1285ce5a59b59f5fc10cd686286df99bfe
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded content are consistent with attempts to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://vilenefex.ru/wix?keyword=cub+scout+belt+loops+history PDF link annotation
    • http://leon-stavki.info/luzagaxabomiw5326.pdfIn PDF document text
    • http://xexuxobofagidad.22web.org/beats_solo_2_wireless_headphones_review.pdfIn PDF document text
    • http://petersikdar.com/97626672627jm2vz.pdfIn PDF document text
    • https://tefeteti.weebly.com/uploads/1/3/0/9/130969297/ded2e.pdfIn PDF document text
    • https://gefumugizifoz.weebly.com/uploads/1/3/0/7/130739155/fenitovebopa-xuxud-diwuseb-xusaxaz.pdfIn PDF document text
    • http://miwafonub.22web.org/what_are_some_facts_about_human_trafficking.pdfIn PDF document text
    • http://catsism.com/25606532651lcgxh.pdfIn PDF document text
    • https://tozubovudifudi.weebly.com/uploads/1/3/5/9/135973827/6445850.pdfIn PDF document text
    • http://seomagnat1.online/rujaluv270i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1923cd7-bc7b-420e-a55d-302e7358ffb0/vw_transporter_service_centre_near_me.pdfIn PDF document text
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_50b73a6577d84e2493d6c188279a4f23.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/how_to_fix_printer_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/best_automatic_pasta_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/crenas_populares_samuele_bacchiocchi.pdfIn PDF document text
    • http://sabozovitebem.rf.gd/bible_verses_bookmarks.pdfIn PDF document text
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_9900e7895fd547c6bf40363e89ed437c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8690f9b-0106-40f7-83a0-5b7bdccf956e/craftsman_garage_door_opener_remote_control.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ea68a0-301c-4b94-be9c-7b7c3572a57f/95296349951.pdfIn PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_e9e9d1d1452e4b309ee03075dc8663c1.pdf?index=trueIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000121e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E7 4956 bytes
SHA-256: 4c2dff559079d4a104cd9e11c0fcfb1066e3b1a6ed603668b4cf292a57d0dcc8
font_01_sfnt_off000132bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132BC 10540 bytes
SHA-256: aeb63fb6957994fe0666f580c064aefff27dee9dbdaeb959904898f67bd733cf

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