Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9a06e62f3d9de1c…

MALICIOUS

PDF

92.8 KB Created: 2021-03-17 15:57:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2adb8e3ff11e5469d4a4ae95780b57ce SHA-1: d0b8c4803bdace59314c6008add6f285c040e05d SHA-256: b9a06e62f3d9de1ccd93ce74230c138fbb28781b836ec4b211341e34aec8c54e
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a ClamAV signature and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary URL, 'https://soxebez.ru/strik?utm_term=kenmore+sewing+machine+158.521+manual', indicates a lure related to a sewing machine manual, likely to trick users into clicking through to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://soxebez.ru/strik?utm_term=kenmore+sewing+machine+158.521+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366015/normal_602ab75a4ee56.pdfIn PDF document text
    • https://xelinibi.weebly.com/uploads/1/3/0/7/130739371/3a2da.pdfIn PDF document text
    • http://serururepus.scienceontheweb.net/employment_contract_sample_kenya.pdfIn PDF document text
    • https://xijoxamapapi.weebly.com/uploads/1/3/4/3/134337958/fazomuwo-zesinodoxarepa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484376/normal_5fdf1f9a3ce89.pdfIn PDF document text
    • http://eurostore.info/tie_knot_meaning_marathiir135.pdfIn PDF document text
    • http://axecheat6.xyz/64810167543r4kxd.pdfIn PDF document text
    • https://vidiguwases.weebly.com/uploads/1/3/4/3/134347373/7b053a2f.pdfIn PDF document text
    • http://axecheat7.xyz/10982837215506j.pdfIn PDF document text
    • https://toposizijud.weebly.com/uploads/1/3/0/7/130776562/8a4e7961.pdfIn PDF document text
    • https://wavajonenavu.weebly.com/uploads/1/3/1/8/131871509/9882667.pdfIn PDF document text
    • http://infonewstravel.com/team_go_rocket_lineups_2020b8qrx.pdfIn PDF document text
    • http://parazepurafeza.medianewsonline.com/wutilu.pdfIn PDF document text
    • http://republvinb.fun/934580557965qity.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/authors_purpose_pie_anchor_chart.pdfIn PDF document text
    • http://lidzadva.xyz/bootstrap_4_simple_form_template32gg0.pdfIn PDF document text
    • https://lonirukigosoz.weebly.com/uploads/1/3/5/9/135965403/sogusam-kuduxalaji-furaba-tetepizo.pdfIn PDF document text
    • https://feziriwavejoli.weebly.com/uploads/1/3/4/0/134096108/zolor-soweborawedugu-gurapu-bafanuwovo.pdfIn PDF document text
    • https://jodemugibinid.weebly.com/uploads/1/3/5/3/135347277/3d762f.pdfIn PDF document text
    • http://wowitaly.space/cron_entry_format_in_linuxlblcw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468838/normal_60479736c5395.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://zujisofivo.onlinewebshop.net/wetijinazu.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_off00011ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA3 5612 bytes
SHA-256: fbce331ed5438d64da1bd6741158eba54bdc3a18e775af05ac34f21157dff6b0
font_01_sfnt_off000131a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131A7 11132 bytes
SHA-256: 51a977bf5f2577b0dfe6216e760b58cefe814bd83665d19e388b3cd557bcf07e
font_02_sfnt_off00015790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15790 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f