Malicious PDF — malware analysis report

Static analysis result for SHA-256 59365e21cfec9faa…

MALICIOUS

PDF

75.5 KB Created: 2021-02-21 21:13:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4133f0ca552e6dcdf8ceb783ea46d364 SHA-1: 96c26498b190dabb1b9c302d48a4c4627cd3ca72 SHA-256: 59365e21cfec9faa1db3cd5c0ab0afeb42a3524a1620e28608a1a0d7791ddeca
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://maypoin.ru/wix?keyword=yellow+brick+war+pdf PDF link annotation
    • https://bosudire.weebly.com/uploads/1/3/4/4/134456289/lomekumow.pdfIn PDF document text
    • https://liwifaxuje.weebly.com/uploads/1/3/0/8/130874244/miropataku.pdfIn PDF document text
    • https://kulaxewanugig.weebly.com/uploads/1/3/1/3/131384484/xifimevimufu_rigow_sujamelesoz.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/chcIpua/zedixogefoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445532/normal_5fd7981d5d33b.pdfIn PDF document text
    • https://rijagadufe.weebly.com/uploads/1/3/1/6/131606992/rawagofagamer.pdfIn PDF document text
    • https://gorogonib.weebly.com/uploads/1/3/0/7/130775466/rokuwixon_voliv_rujiluzanokotej_murabufori.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/Yieifje/go_dune_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370087/normal_5fc5e9ea0055e.pdfIn PDF document text
    • http://mibeneto.22web.org/signup_page_bootstrap_template_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kevapaboxer/hgd6vsp/88980075922.pdfIn PDF document text
    • https://cdn.sqhk.co/zudoputasafe/XKf23Xx/28347906004.pdfIn PDF document text
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/8634d.pdfIn PDF document text
    • https://vifawadezak.weebly.com/uploads/1/3/4/8/134846548/xozobijefelokusan.pdfIn PDF document text
    • https://rapovadok.weebly.com/uploads/1/3/4/7/134705404/8967597.pdfIn PDF document text
    • https://sobozapagudop.weebly.com/uploads/1/3/4/0/134040761/cf09987af7046.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://kasegek.rf.gd/9580406305.pdfIn PDF document text
    • http://resutujimi.epizy.com/checkpoint_5900_appliance_datasheet.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_off0000dc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1F 4832 bytes
SHA-256: 4360e3fde151e5607502af9ff9c929b78b1652d96365c5c64c20ac2287f31d96
font_01_sfnt_off0000eca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA5 11004 bytes
SHA-256: b8c90caf81b58c50a19278c974b1292f24e4d67ffca41305d806cc4a1706769c
font_02_sfnt_off00011263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11263 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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