Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b0c9166a62e0cde…

MALICIOUS

PDF

82.9 KB Created: 2021-05-02 23:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 172917dbc498c7efd3d02750a9073352 SHA-1: 63717be0770129aa090cb763902fa178398ca357 SHA-256: 7b0c9166a62e0cde5bf606158a701e1fb1bae7fcdfbc7f0afce66186cb419e7b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The primary external URL, 'https://soxebez.ru/strik?utm_term=what+is+keto+zone+diet', indicates a potential phishing or scam lure related to diet information. No scripts were extracted, but the PDF structure itself facilitates the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/strik?utm_term=what+is+keto+zone+diet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488316/normal_603f897ae5df2.pdfIn PDF document text
    • https://cdn.sqhk.co/sevijeruba/heIpEjc/53793028625.pdfIn PDF document text
    • https://cdn.sqhk.co/gowozepugax/jgoihYG/best_way_to_clean_up_3d_printed_parts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_5fd8f236d9298.pdfIn PDF document text
    • https://cdn.sqhk.co/risevejuxik/Lybiigj/42040403869.pdfIn PDF document text
    • https://cdn.sqhk.co/jimevexir/ibkBEhh/photo_warp_app_iphone_free.pdfIn PDF document text
    • https://cdn.sqhk.co/gubogezemazo/igEhbic/open_source_camera_app_android.pdfIn PDF document text
    • http://dusibarupuguli.medianewsonline.com/lexique_assurance_franais_anglais.pdfIn PDF document text
    • https://cdn.sqhk.co/kizulajeli/HP6jdK4/wetivixenivesebovep.pdfIn PDF document text
    • https://cdn.sqhk.co/feziwetesene/d6bgegi/susoziw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467287/normal_5fd640f6e4ecb.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/dnaijie/bmobile_security_app.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/a96ca260-196e-413f-882a-10366c60119d/dell_inspiron_620_motherboard_manual.pdfIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_81f9456d7f2b48db8cfe1f64770e037d.pdf?index=trueIn PDF document text
    • http://jitawidavez.atwebpages.com/ralizefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0387633-5a08-4e44-98bf-223e6854f481/82902778166.pdfIn PDF document text
    • http://feferabi.atwebpages.com/8945020198.pdfIn PDF document text
    • https://d70b1dc8-7d09-4148-9854-e6a7cae1b87b.filesusr.com/ugd/5899d5_fddf69ffbb3c4dc8ba56d374c0dcc147.pdf?index=trueIn PDF document text
    • https://e06e8306-d71e-4c92-aa1b-e8c52eeb44cb.filesusr.com/ugd/bc4951_66d0b4906d5e40a58e37cbda7af362f7.pdf?index=trueIn PDF document text
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_6d974ed362d34bba88dbb95825fd2192.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_off000107b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B4 4912 bytes
SHA-256: 7de310ff852af34711ce1e719f0120eb141990e1e4e91220c734433a27af0c28
font_01_sfnt_off0001187e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187E 11256 bytes
SHA-256: d33be26033251eb81301d208573aee2a604a8f1f3609a2209d240ea0e7b35b5e

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