Malicious PDF — malware analysis report

Static analysis result for SHA-256 2911499416843131…

MALICIOUS

PDF

98.9 KB Created: 2021-04-30 20:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8fdd11ec125bc62746e28c2403837cdf SHA-1: dd8f6e15c7efcf8fc2be789dde890c714456b845 SHA-256: 29114994168431311dd7a9816f8e3f8f1fdd0234a08a82bdcd3b8f289256769b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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://jumiwimov.ru/strik?utm_term=what+are+the+benefits+of+cooperative+learning+strategies PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490523/normal_603fcfbe5e621.pdfIn PDF document text
    • https://nitevugumosu.weebly.com/uploads/1/3/4/5/134526644/42a73a45f41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452152/normal_6037e3ab36a7b.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/libro_de_filosofia_2_bachillerato_resueltoxm4v6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380223/normal_5ff205365162d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471096/normal_6016ca058853b.pdfIn PDF document text
    • http://khareedforosh.com/movofufizivb3202.pdfIn PDF document text
    • https://piximemob.weebly.com/uploads/1/3/4/3/134371032/momosazasefaza.pdfIn PDF document text
    • http://rerixen.scienceontheweb.net/non_verbal_analogy_test.pdfIn PDF document text
    • http://kepuxom.mypressonline.com/tawiwepilapusositiwuzapa.pdfIn PDF document text
    • http://detonicro.website/titerp1es4.pdfIn PDF document text
    • http://chebsvet.ru/35119178681q2vr3.pdfIn PDF document text
    • https://fasuwilobavofe.weebly.com/uploads/1/3/4/4/134489762/rijiwuse-bixirufobunaliv-xelagaram-woxodavikuje.pdfIn PDF document text
    • https://juniverobov.weebly.com/uploads/1/3/5/3/135317499/e3fcd6.pdfIn PDF document text
    • http://1freedom.space/whatsapp_apk_mirror_android_2._3sjnem.pdfIn PDF document text
    • http://ionatr.fun/ne_me_quittes_pas_parolesey2dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379726/normal_5fdb6dfd1c902.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://keporeninudo.rf.gd/35888869083.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/how_can_educators_become_culturally_competent.pdfIn PDF document text
    • http://bojogidolivowes.epizy.com/15555008299.pdfIn PDF document text
    • http://mevonaku.rf.gd/usb_bluetooth_for_android_tv_box.pdfIn PDF document text
    • http://weverikovufom.rf.gd/how_do_you_study_for_the_cpc_exam.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000145ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145BA 5488 bytes
SHA-256: a3cc7f45a578d47bec1cd1a1288199b90dd02309405d68ec78885d48f39a25c4
font_01_sfnt_off00015878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15878 10996 bytes
SHA-256: ea6f49bf0d64474b04b2741b629698d83f957fa59c045f0a405baf170b7781c9

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