Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a250516e6acdc2…

MALICIOUS

PDF

80.5 KB Created: 2021-05-14 14:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5deb08882038f85fde14f475a327074c SHA-1: 10860dae112aff3a22f41e0288836a4398be3d54 SHA-256: 01a250516e6acdc2af128d083b821652ecd5e5cae3e41fc11de72d299ef1119c
126 Risk Score

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-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://seumenha.ru/strik?utm_term=what+kind+of+oil+does+a+2001+honda+accord+take PDF link annotation
    • http://custits.space/futipumuzivinimulolo35hzw.pdfIn PDF document text
    • http://joweponula.mywebcommunity.org/beowulf_new_english.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/cjjgdEo/70013309138.pdfIn PDF document text
    • http://wivadanege.iblogger.org/zojenusifavut.pdfIn PDF document text
    • http://twirlini.com/zifurefebuj6x9a.pdfIn PDF document text
    • http://unlockdeals.shop/684061514616tv3v.pdfIn PDF document text
    • http://zozitaze.mypressonline.com/604217286.pdfIn PDF document text
    • https://cdn.sqhk.co/zibavuna/fMM3vdU/all_college_football_scores_2020.pdfIn PDF document text
    • http://sunipemumax.66ghz.com/standard_operating_procedure_of_autoclave.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://radikabo.rf.gd/68511651392.pdfIn PDF document text
    • http://jalijoruki.atwebpages.com/fagot.pdfIn PDF document text
    • http://xadaguxo.rf.gd/articulaciones_sinartrosis.pdfIn PDF document text
    • http://rovatidakenaj.rf.gd/pebifigupotojijoxen.pdfIn PDF document text
    • http://kuzibawo.rf.gd/nanuzezavuziwimusixoxiru.pdfIn PDF document text
    • http://raxegujanamefas.atwebpages.com/exercice_corrig_sur_l_atomistique.pdfIn PDF document text
    • http://jazopizebe.atwebpages.com/34491280828.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_off0000ef73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF73 5300 bytes
SHA-256: 9f6c938fdccb395749028c96f7cebe1d3c958edc69071c4afb3bd7993a2d8905
font_01_sfnt_off00010179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10179 10768 bytes
SHA-256: cfb5d6d700622b8ad4ef97b04bebcfcff92c3ea526d3bb7917bdf732d49345fa
font_02_sfnt_off00012616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12616 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176