Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2575016f0d6996a…

MALICIOUS

PDF

79.2 KB Created: 2021-03-17 18:45:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e42d5e29910c903aa54951f7accda388 SHA-1: 5bfb586ca03b8d99605dd0809ba38afd3bff4f7c SHA-256: a2575016f0d6996a7f0c5d6930e1e4c7fbd2f0f824f348918300c924bc8a1b99
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary one pointing to 'maypoin.ru', suggesting a phishing or malicious content lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, reinforcing the malicious intent. While no scripts were extracted, the structure and embedded URLs strongly suggest the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/award?keyword=alimenta%25C3%25A7%25C3%25A3o+saudavel+adolescencia+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413982/normal_60246f69ccb52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484806/normal_5feb89bda9e1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423189/normal_5ff66267a96ec.pdfIn PDF document text
    • http://ital-tess.space/tulatewakovarasuravijimarf5c52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444856/normal_5ff3b7267eace.pdfIn PDF document text
    • http://vinnipoh.fun/guess_how_much_i_love_you_baby_shower_giftpiit8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484814/normal_5ff799bd07a91.pdfIn PDF document text
    • http://pixelbarista.com/581059415525v6zf.pdfIn PDF document text
    • https://dajusokododolin.weebly.com/uploads/1/3/5/9/135964726/kedusizep.pdfIn PDF document text
    • http://all-system7.work/69321353388rb3un.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470678/normal_5fdb0d972e5bd.pdfIn PDF document text
    • https://zijunuriv.weebly.com/uploads/1/3/4/8/134892089/4310375.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384851/normal_5fc75a6153db0.pdfIn PDF document text
    • http://samettemiz.xyz/gitupozufebuzegulopad65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406166/normal_604b96b7c1446.pdfIn PDF document text
    • https://mobajexiv.weebly.com/uploads/1/3/4/4/134455683/zedexexob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384464/normal_6038420314a9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465538/normal_601d60c03af84.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_be98caf446994dd183a0d1c703a9098d.pdf?index=trueIn PDF document text
    • http://jegudorutomowur.epizy.com/53704014420.pdfIn PDF document text
    • http://zuronixo.rf.gd/72885186686.pdfIn PDF document text
    • https://1b6fbac1-9b66-4609-9151-81f5d4c316f7.filesusr.com/ugd/5e81b9_482b4686a5c04a88b1ffae1a856a7398.pdf?index=trueIn PDF document text
    • http://gurebuvijo.epizy.com/zoralevizatulumipufam.pdfIn PDF document text
    • http://botusomiwa.epizy.com/59908227154.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_off0000f2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C0 5752 bytes
SHA-256: 395820166b6d698d3df01dfaa2c954a93b753c4cdc8e8d7b04d7f127c7bc6601
font_01_sfnt_off00010574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10574 13076 bytes
SHA-256: c32b17b919b0933b162fa6a2216fb61e0f77ba3463336186fa3d2395ece969c2

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