Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffbf514d7f7413b…

MALICIOUS

PDF

71.6 KB Created: 2021-03-12 14:37:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 159cb318255bf9941eb774250f28ab1b SHA-1: 9c90ae70557d02f88e990e0ced7cef314292e76a SHA-256: 0ffbf514d7f7413b814bcba9e28f7f5bb4823fb162812712c6773eb4b21c569f
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs that point to a link farm hosted on disposable domains, suggesting a phishing or SEO poisoning campaign. The document body, though heavily obfuscated, appears to contain keywords related to local businesses, likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=number+1+chinese+kitchen+reisterstown PDF link annotation
    • http://gejopuzebizovuk.iblogger.org/17443059685.pdfIn PDF document text
    • http://linodogeb.scienceontheweb.net/lavulukawoxafagiw.pdfIn PDF document text
    • https://cdn.sqhk.co/jopuromug/hjdiahf/youth_archery_lessons_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391634/normal_5fe6923171fce.pdfIn PDF document text
    • http://manapuzasupin.sportsontheweb.net/30311566520.pdfIn PDF document text
    • http://xiruzox.mygamesonline.org/astronomy_basics_beginners.pdfIn PDF document text
    • http://juvizex.sportsontheweb.net/best_vegetarian_cookbooks_uk_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/DPigPhj/sekasesi.pdfIn PDF document text
    • http://fidofawi.medianewsonline.com/96693206067.pdfIn PDF document text
    • http://fujigukatujewu.medianewsonline.com/44658089145.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420430/normal_5fe2022d1789e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494648/normal_6001673e56f44.pdfIn PDF document text
    • https://cdn.sqhk.co/novitovikor/ieghbgd/69446160751.pdfIn PDF document text
    • http://zusiwibewire.mypressonline.com/multiplication_flash_cards_online_5th_grade.pdfIn PDF document text
    • http://bupitubegedew.getenjoyment.net/journal_of_business_finance_and_accounting.pdfIn PDF document text
    • https://cdn.sqhk.co/luwukamuku/jhihwBf/61393812881.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tuvatopuvonu.epizy.com/most_common_russian_phrases.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/zepomazokefeluti.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/37848951119.pdfIn PDF document text
    • http://sezatubokapalut.epizy.com/adding_integers_free_worksheets.pdfIn PDF document text
    • http://tizedukef.epizy.com/free_2004_cadillac_srx_repair_manual.pdfIn PDF document text
    • http://kufuravolej.rf.gd/derived_class_template_constructor.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE54 4996 bytes
SHA-256: 5c0cdc2e2a98173fd7fc685944ba5da0e65fd52d250ced9a67bc69b2b317a8f2
font_01_sfnt_off0000df44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF44 10368 bytes
SHA-256: 4181fd920feab1b8a30bc1a101779eca9ee7b6bb515023277afcf6722ef67b7e
font_02_sfnt_off000102bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BD 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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