Malicious PDF — malware analysis report

Static analysis result for SHA-256 872a966126402690…

MALICIOUS

PDF

81.3 KB Created: 2021-05-07 20:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a5cfa5589b0f03e955541e538b860117 SHA-1: 2081062c16d1d00cbaf2eeaa81935cecd2cfbddd SHA-256: 872a966126402690348d963452c8a794211943212cb7223f21b5caecb5704d71
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 0.9954

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://mezovuduw.ru/strik?utm_term=what+does+mourning+dove+mean PDF link annotation
    • https://cdn.sqhk.co/nixagigad/6ha2rEV/duvukuratufipux.pdfIn PDF document text
    • http://mazusipitazozi.22web.org/dawobutafosaleparuka.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/haier_portable_air_conditioner_replacement_hose.pdfIn PDF document text
    • http://xibesofene.22web.org/kane_and_abel_novel.pdfIn PDF document text
    • http://maxist.ru/kejizujunetijiwokukhsere.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/rigosuleduvuzijebuzuju7plo7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454161/normal_5fdf080e92778.pdfIn PDF document text
    • http://mebelrostov.ru/sujipetupavimbxdee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388620/normal_5feb5a651ff77.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/hgfOLjj/dubisoneladovujufeb.pdfIn PDF document text
    • http://sallehq.xyz/ragubolorigusobebuwabomuybaad.pdfIn PDF document text
    • http://jurojegame.getenjoyment.net/australian_animals_word_search.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/anign8B/69_super_cobra_jet_for_sale.pdfIn PDF document text
    • http://mifilud.iblogger.org/cours_complet_sur_les_bascules.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwojeta/xzKBidZ/baby_panda_loves_bubble_bath.pdfIn PDF document text
    • http://kalosisid.iblogger.org/bobcat_709_backhoe_mounting_brackets_for_773.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387706/normal_603b9af5bc125.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/cgcji9A/puzumixatobinosoma.pdfIn PDF document text
    • http://ginixotojaru.medianewsonline.com/2672319249.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487888/normal_5fecec1221e2c.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://reduxaxu.epizy.com/adobe_after_effects_cs5_tutorials.pdfIn PDF document text
    • http://vakusidoler.epizy.com/jozakotexakese.pdfIn PDF document text
    • http://lanakupi.epizy.com/autocad_trial_version_2014_free.pdfIn PDF document text
    • http://ninonasoligu.rf.gd/mabapenegogug.pdfIn PDF document text
    • http://jugugesazo.myartsonline.com/koperad.pdfIn PDF document text
    • http://zaduzos.myartsonline.com/definition_of_business_research.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_off0000f202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF202 5160 bytes
SHA-256: 56cebadcfe35caa455c4e2b2753cb645df3427d65b7e430d02ce173634d3a090
font_01_sfnt_off00010376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10376 11160 bytes
SHA-256: e52b1457afa4e36e39775bfe969cba40210f4dac757fb12a7af645298b2c1be2
font_02_sfnt_off00012964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12964 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e