Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d9bf8e92eca10d8…

MALICIOUS

PDF

70.2 KB Created: 2021-03-23 08:56:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e601414369ab9d9a3f8283db198ab55b SHA-1: 51d76b910864229082495074e4d14ffb4c5839e0 SHA-256: 7d9bf8e92eca10d8af1468e8aa7b45dce0faa1db3e477156c27747f609576239
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 0.9998

Heuristics 5

  • 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 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://pelibifir.ru/strik?utm_term=mapa+conceptual+de+los+6+niveles+de+lectura PDF link annotation
    • http://legrand-spb.ru/129894146693w78u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469630/normal_60463b2514689.pdfIn PDF document text
    • http://bbcua.site/draw_me_nearer_lyrics_and_chordsdepgo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454822/normal_601536b4cd930.pdfIn PDF document text
    • https://jokasagumejede.weebly.com/uploads/1/3/1/0/131070006/1ecc004f388.pdfIn PDF document text
    • https://bopidojosonek.weebly.com/uploads/1/3/1/3/131384153/bigop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470380/normal_5ff50412b6964.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365628/normal_5ff4917babe1b.pdfIn PDF document text
    • http://italiabeach.space/3332059665mcdhu.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/bokasafoledukilafovu8ivu8.pdfIn PDF document text
    • https://xokojitijuxup.weebly.com/uploads/1/3/4/3/134362284/sukesefolifew_fetotujanige_zagubuvafejobo.pdfIn PDF document text
    • http://xruhdfo.site/25240753396wk92.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/black_mamba_transformers_ls-_03.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f26d30d6-db6d-42cd-836b-20956b266a3b/covid-19_safety_plan_construction_and_tradespeople.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e8becaa-aa80-494a-9968-635987e7e062/70769620305.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/british_english_to_american_english_words.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/miteluki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/478dd857-f4fd-4d70-a171-5cddb3f054d0/32183202062.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/benzyl_chloroformate_structure.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_off0000d4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C2 5284 bytes
SHA-256: 9f4bf6ce05eee9864f496b56d1b0e7c23ac599e13f9e3a9b36ef07106452995d
font_01_sfnt_off0000e6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DA 11360 bytes
SHA-256: a7e8cc6303f3b5ded8080dcb23668f091d34bd5b6377a9903235efd802dc32e4

Open this report in the interactive analyzer, or submit your own file for analysis.