Malicious PDF — malware analysis report

Static analysis result for SHA-256 06478019848272d0…

MALICIOUS

PDF

79.4 KB Created: 2021-03-20 17:54:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 64607f05df76c38643802ffd1b0c1e89 SHA-1: 42c4152a83783f041010082de3bf9473c9264335 SHA-256: 06478019848272d07fad673610ed24b1b9a18374fba7c8de2dc2a7759d1243d7
226 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external URIs pointing to various domains. The presence of a password archive lure heuristic suggests it may be used to conceal malicious payloads, with the document providing instructions to bypass security measures. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://resalured.ru/award?keyword=archer+c59+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413243/normal_6036675b13d7a.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/zudosevopigibidugobozu.pdfIn PDF document text
    • http://copyrightshelpcenter.com/kidoxupojosafafenujepntkmy.pdfIn PDF document text
    • http://kipuleli.iblogger.org/19031296937.pdfIn PDF document text
    • http://rarubife.mygamesonline.org/79316226770.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409098/normal_5fdc25687467a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456728/normal_60463eb747503.pdfIn PDF document text
    • http://nakrutkavk.site/worarojovoluvofusunugitod1uo6w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529697/normal_6044de1e131ab.pdfIn PDF document text
    • http://aduo5.online/69736231280n7588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369762/normal_603ad3860f8ab.pdfIn PDF document text
    • http://mopomelodow.iblogger.org/57461477044.pdfIn PDF document text
    • http://sibobovogulumu.22web.org/39821479977.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xakafof.rf.gd/andyroid_android_emulator_free.pdfIn PDF document text
    • https://734e8db3-b9db-457c-abaa-08c06218e7ae.filesusr.com/ugd/f6bb82_6b3c3592a2b54a0eae503b203208b654.pdf?index=trueIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_000b6d1a2a134c8495374f1f0e5a25b2.pdf?index=trueIn PDF document text
    • http://kupikobu.epizy.com/movixedetikulibonu.pdfIn PDF document text
    • http://futikuzita.onlinewebshop.net/sandisk_clip_sport_does_not_turn_on.pdfIn PDF document text
    • http://fefolitaweni.epizy.com/47891277065.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_off0000eb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0F 2996 bytes
SHA-256: cc818ed9a62ae2b794c5d06e5d452725d30f412bee07a7203a6ca420bb733cf6
font_01_sfnt_off0000f5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D2 5484 bytes
SHA-256: 70e5f382fe3494935abff65a8fdf90d212cce2381a1ff61ff1c24fcabb9b7f6c
font_02_sfnt_off00010859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10859 11276 bytes
SHA-256: 1edc88434639841487059c6a7ffc3c380a06dd417ec9bf64f7e8ef739e009ca4

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