Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cdbb045d553d5e7…

MALICIOUS

PDF

75.8 KB Created: 2021-05-10 08:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fb774f82f622b0587c0f2840d03ca17a SHA-1: 96bc76182f06e2a6765f65cfdceb1c80acaf1db9 SHA-256: 2cdbb045d553d5e7e039fcb5e8b72fd994c1667345a426f2cacdff0377b8d698
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 0.9991

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://golowaki.ru/strik?utm_term=singer+handy+stitch+cex300kd PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455916/normal_603a82c5053e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498801/normal_605eff0061e7d.pdfIn PDF document text
    • http://pojekofa.iblogger.org/zepijidekexulezelovutud.pdfIn PDF document text
    • http://tiriruno.sportsontheweb.net/additional_mathematics_1_notes_download.pdfIn PDF document text
    • http://wativeb.mypressonline.com/jipavopukojupupifipeka.pdfIn PDF document text
    • http://vobadixu.22web.org/ontogeny_recapitulates_phylogeny.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481671/normal_60607c940cba1.pdfIn PDF document text
    • http://jumazeg.iblogger.org/how_to_install_honeywell_chronotherm_iii.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/828675115.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485572/normal_603408f80cf3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393898/normal_5ffb9e86a9de7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://436c154b-1c2d-4c60-9768-ed3a268ef5e1.filesusr.com/ugd/e8e253_8f0aa53f39994de2bc8f9623e9ce39ec.pdf?index=trueIn PDF document text
    • http://pikubub.onlinewebshop.net/96647234798.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/vefazirosizalenipi.pdfIn PDF document text
    • https://5e54d98c-4257-4cc7-9010-48f3df296eb2.filesusr.com/ugd/05240c_0ade18c557de43b6b2bc1fdbfeb138cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/54712272313.pdfIn PDF document text
    • https://b36ad067-21ef-4b17-9055-1dfcbb3fb98c.filesusr.com/ugd/8673ad_bd2b7529952f45b182462cec1c46e834.pdf?index=trueIn PDF document text
    • http://nefotux.epizy.com/keithley_2401_datasheet.pdfIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_14a9fd87ad9143669da2990b9b337a10.pdf?index=trueIn PDF document text
    • https://8994dc82-3839-475c-8de5-8afaa5c13229.filesusr.com/ugd/798b5e_a8bfe7586e4b4111ba510a4d2c9570f5.pdf?index=trueIn PDF document text
    • http://jufakoxageponuz.rf.gd/96647964995.pdfIn PDF document text
    • http://guriseb.myartsonline.com/shorthand_common_words.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/what_are_the_conflict_resolution_skills.pdfIn PDF document text
    • http://debagejusuwaj.epizy.com/pexir.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_off0000e621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE621 5812 bytes
SHA-256: a9c10493e84e8c251afb6aac30117f01a4f774338fee0ac676bc38da9edeeeee
font_01_sfnt_off0000f9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EB 11716 bytes
SHA-256: f7830aa239d27f70066721752991ba2ad398a8020fda86a12a30a5da04b19060

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