Malicious PDF — malware analysis report

Static analysis result for SHA-256 7834534b1b6505f0…

MALICIOUS

PDF

75.4 KB Created: 2021-04-12 02:27:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 19831f5260a620328826bffe1f00e272 SHA-1: db2da17972bc64bb1bb023e548dd4e93c9060aff SHA-256: 7834534b1b6505f09de8fa397bb0ed63ec7720bcaaa1a85831657f073d38a8c7
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 0.9992

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://bologen.ru/strik?utm_term=how+much+is+the+cost+of+living+raise+for+2020 PDF link annotation
    • https://lamuwopinu.weebly.com/uploads/1/3/4/6/134632291/882a6c7a27.pdfIn PDF document text
    • http://xorimomupajo.scienceontheweb.net/california_real_estate_agent_exam_preparation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494139/normal_6015aef205ba7.pdfIn PDF document text
    • https://kukegogefip.weebly.com/uploads/1/3/2/6/132681459/7848d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368788/normal_60622a54ac217.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379719/normal_5fff4e4117506.pdfIn PDF document text
    • http://kubosikavudux.mygamesonline.org/magisterio_definicion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384318/normal_606b526cdee62.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwuwigo/Wghicgi/savings_goals_by_age_uk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486982/normal_5fe56ce3bb3c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374953/normal_5fcbdec4e1f3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404292/normal_60397e3575aa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474206/normal_6030a57519583.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/f0gchih/derwent_colored_pencils.pdfIn PDF document text
    • http://giwosoto.sportsontheweb.net/silver_shadows_apartments.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485310/normal_5fc6b467f09e0.pdfIn PDF document text
    • https://cdn.sqhk.co/vixawutozama/jjhbhg9/gexitosugo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nakeviw.myartsonline.com/nebazex.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/50573432311.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/beriwolofinexixojiku.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/importance_of_the_whitehall_study.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/celtic_harp_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/what_are_the_3_levels_of_organization.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_off0000e840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE840 5680 bytes
SHA-256: fd215c1aab62108b19463ec74ac499f7ebbd08e4639bf119682be6582d3574d9
font_01_sfnt_off0000fb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB83 10516 bytes
SHA-256: 24664863aa3016f65601a792f99d779380a882c04779856bf367e6cd24efb2c7

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