Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6826267fa4af3d4…

MALICIOUS

PDF

68.5 KB Created: 2021-03-29 18:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9d7fb60ec043bbab20dbac5ed4115a27 SHA-1: c04cb56e2c1f602cd3e9cac95a9c643912625ea0 SHA-256: a6826267fa4af3d45576e53e8573b044e7acbc8c43270583672da2655d721f6c
186 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 0.9996

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://jumiwimov.ru/aws?utm_term=where+d+you+go+bernadette+trailer PDF link annotation
    • http://idealicaitalia.website/what_do_the_cards_represent_in_alice_in_wonderland6fywc.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/the_joy_of_creation_reborn6abwp.pdfIn PDF document text
    • https://rowurasivove.weebly.com/uploads/1/3/4/3/134357219/nirodasogajadelumo.pdfIn PDF document text
    • https://xesofizagib.weebly.com/uploads/1/3/4/4/134491847/foxuposikonef.pdfIn PDF document text
    • http://lolkek.xyz/72918075053i1cjb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_601f47e2ea0f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450727/normal_603ea0d1c45d8.pdfIn PDF document text
    • https://firulozide.weebly.com/uploads/1/3/0/7/130775295/moruxekaluse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455390/normal_605ee63f5f3c3.pdfIn PDF document text
    • http://clipshd.design/85384178349b1o7y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370270/normal_6057f9b40f60d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414701/normal_5fd70c43c89f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459060/normal_60055d30908d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464052/normal_5ff5f42c02c53.pdfIn PDF document text
    • http://deflecfcvy.best/gajovelokajutun0kgxf.pdfIn PDF document text
    • https://sarogixi.weebly.com/uploads/1/3/0/8/130813770/depikarik.pdfIn PDF document text
    • https://butijewib.weebly.com/uploads/1/3/4/8/134886415/lugogisobu_somulafuliwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369514/normal_6055ed477cef6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dazemi/65610009920.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/54598617096.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC2 5164 bytes
SHA-256: 1fdfd00274b58005c44e91a210c83e0d94b150190abb0edfc79543080023cd56
font_01_sfnt_off0000df61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF61 10584 bytes
SHA-256: e7863a826c07759575b67aa500d4b2d4c959ff639ff5cee12eb00b0dd9df084a

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