Malicious PDF — malware analysis report

Static analysis result for SHA-256 f905d843fb65140a…

MALICIOUS

PDF

80.9 KB Created: 2021-04-12 13:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1565446c712b115ca75d589ac416b2d0 SHA-1: df45c5a0d0139577733981044e30e00f156ff805 SHA-256: f905d843fb65140a2097c842ef785c9eb794ccef147c2423edcde66c6553d1ae
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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://ponafet.ru/strik?utm_term=when+a+capricorn+man+is+interested+in+you PDF link annotation
    • http://trickyturkey.com/xobogalavujakimopurunokdcb5h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369190/normal_5ff51da0bc848.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386089/normal_5fcbc5dc5fa19.pdfIn PDF document text
    • http://xatubaxo.iblogger.org/what_channel_is_flowers_in_the_attic_on.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466366/normal_5fd27c3fe0eb7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476750/normal_5fdcb0274dc59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413113/normal_5ff4cef2b2e4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389365/normal_60082e7881886.pdfIn PDF document text
    • http://grigolia-studio.ru/what_is_texas_sales_tax_rate_on_carsdtd83.pdfIn PDF document text
    • http://kpupnov.pro/after_we_collided_movie_release_date_2020_danmarkr98mw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370768/normal_6003e7fa7344f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_601e5769a8392.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411498/normal_5fda546d2747d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417643/normal_601911badcbdf.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
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_279bc1b55d1447b09c8c902a3165daf4.pdf?index=trueIn PDF document text
    • http://xexewul.epizy.com/dutuguzavojafaso.pdfIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_75a101029ea446e3afb7ebdec4795b3d.pdf?index=trueIn PDF document text
    • https://19aaccd0-9772-41b6-85c4-be118606641a.filesusr.com/ugd/a12125_6cbae0d5d9f1431dba915bd9c3dcfe0c.pdf?index=trueIn PDF document text
    • http://nabasuxogakuwet.epizy.com/afro_american_fragment.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

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_off0000f131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF131 5280 bytes
SHA-256: 8c3a947c6fa14c2b837d033fade6b58aeb4966dae9111cb2892d6ebcd814b86a
font_01_sfnt_off000102f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F6 10848 bytes
SHA-256: e8779038532ff24069c8c428c47a89948cb0049b089cfd1cf5befd7b9adc4c25
font_02_sfnt_off000127bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BB 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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