Malicious PDF — malware analysis report

Static analysis result for SHA-256 a46ef47601907a03…

MALICIOUS

PDF

69.4 KB Created: 2021-04-22 13:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 00d7bb44313165a12f105a6a25c9e0e5 SHA-1: 4712b82e1d7760dffbb0b5776ae93807c1442583 SHA-256: a46ef47601907a0357e357c2d7acf8e33dcc3a07d9546430035898cc9cef0d07
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to disposable domains and are likely part of a link farm. The ML classifier and ClamAV both flagged this PDF as malicious, with ClamAV specifically identifying it as a phishing trojan. The embedded URLs suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=how+to+draw+a+dog+art+for+kids+hub PDF link annotation
    • http://onsideball.info/defining_and_non_defining_relative_clauses_worksheets_with_answers4m9vl.pdfIn PDF document text
    • http://jobware.pro/24146044632ljpjq.pdfIn PDF document text
    • https://cdn.sqhk.co/zulatobi/ichMkpc/64136104830.pdfIn PDF document text
    • http://tovarzone.ru/volus2bpik.pdfIn PDF document text
    • http://1xbets-regs.site/24730952745by15y.pdfIn PDF document text
    • https://zeposonuvijuz.weebly.com/uploads/1/3/4/7/134702940/nodipafevuseger.pdfIn PDF document text
    • https://nusimilanagazi.weebly.com/uploads/1/3/1/4/131454102/15206.pdfIn PDF document text
    • https://cdn.sqhk.co/totimujid/oigNiaD/23704907474.pdfIn PDF document text
    • https://tiselewo.weebly.com/uploads/1/3/1/6/131606631/16a4f0adfec20e.pdfIn PDF document text
    • https://mavekajokirusap.weebly.com/uploads/1/3/1/4/131437454/1560424.pdfIn PDF document text
    • http://guitar.su/winujudanesetabebuvgzoio.pdfIn PDF document text
    • http://apparentlyopt.com/who_was_the_mother_of_cain_and_abel_in_the_bible7rx34.pdfIn PDF document text
    • https://nutajutibasetak.weebly.com/uploads/1/3/4/6/134638930/lemibujig.pdfIn PDF document text
    • https://wibipujesotut.weebly.com/uploads/1/3/1/3/131398272/medapokilezemo.pdfIn PDF document text
    • https://cdn.sqhk.co/gupuwiwi/WjhihTm/high_speed_rc_boats_for_sale.pdfIn PDF document text
    • https://wojaginobaxap.weebly.com/uploads/1/3/1/8/131857211/4827214.pdfIn PDF document text
    • https://balijijileg.weebly.com/uploads/1/3/4/5/134505585/zejifakotikema.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/takateg/kiwizin.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/2005_acura_rl_transmission_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/najowonesiw.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/wezopilo.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/spyro_year_of_the_dragon_trophies_guide.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_off0000d03b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03B 5396 bytes
SHA-256: 97b9a3c136bb1e4c8d223b542ff9f4f68a693632071c4c26337c82b53974359c
font_01_sfnt_off0000e2a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A3 10932 bytes
SHA-256: 4e3095f561c655fee6278a93af316b7c498a99aacff033793159777b8c305274

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