Malicious PDF — malware analysis report

Static analysis result for SHA-256 d71ee549cde3193b…

MALICIOUS

PDF

71.7 KB Created: 2021-05-06 15:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 751ceba4b290f88956bf374c811fd11d SHA-1: 14506d4650e3e4842148a523c6d3f7fc266a7c76 SHA-256: d71ee549cde3193b74612a185cf00213752ae816e80949b78578075425db59ae
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 0.9998

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://fokemale.ru/strik?utm_term=padi+advanced+open+water+certification+depth PDF link annotation
    • https://nefupoxuwuridek.weebly.com/uploads/1/3/4/7/134747690/foruzu-fotunemoruzik-wikojasolosove-jilogizewerug.pdfIn PDF document text
    • http://profaudit32.ru/fl_error_code_on_speed_queen_washerpvyr8.pdfIn PDF document text
    • https://pozopili.weebly.com/uploads/1/3/4/3/134310053/1118419.pdfIn PDF document text
    • http://dirujadejefogax.iblogger.org/44081992507.pdfIn PDF document text
    • https://dejegudiferu.weebly.com/uploads/1/3/1/8/131857494/bibowenobenelobowog.pdfIn PDF document text
    • http://xegazinijitup.mywebcommunity.org/4090528850.pdfIn PDF document text
    • http://wuroguredogir.getenjoyment.net/rosewi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_605256f96d10b.pdfIn PDF document text
    • http://microdigitalmeter.xyz/40014908756o5bmz.pdfIn PDF document text
    • http://birebap.scienceontheweb.net/26602509361.pdfIn PDF document text
    • https://nixixufusolawig.weebly.com/uploads/1/3/4/8/134882604/tagowobuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469827/normal_6061eabe3764a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mavuginogafesu.epizy.com/char_qul_shareef.pdfIn PDF document text
    • http://velefejaforafe.rf.gd/mologakufulodakapodeveg.pdfIn PDF document text
    • http://gedonisezif.epizy.com/lvmh_annual_report_2011.pdfIn PDF document text
    • https://5a2ada08-5b6c-402a-b0df-3636415b461e.filesusr.com/ugd/434ae6_43b46df97be847fa97b070e4d13438f2.pdf?index=trueIn PDF document text
    • https://2acf176d-1645-44e4-83be-c67f7ac9af6b.filesusr.com/ugd/e72dd6_24fd30b11a1b4ffc969d662da7efc235.pdf?index=trueIn PDF document text
    • https://d52369c8-37f2-40d9-9d5f-d682b3b4a2e4.filesusr.com/ugd/6d5a7b_934864a47506405a812e5cc41e974691.pdf?index=trueIn PDF document text
    • http://japivolenalu.epizy.com/mixeganuzozurotaxu.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_off0000db7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7A 5184 bytes
SHA-256: 322ff2ce846f40165d52c7f02319ed704a922c877cb5324a757d1ebdf38cedef
font_01_sfnt_off0000ed36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED36 10624 bytes
SHA-256: 608b9ce13b1afe719b34ad8e0b592a23c70a9abcc7ef7d1d73240af42a3e20b0

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