Malicious PDF — malware analysis report

Static analysis result for SHA-256 d418162c2758c02c…

MALICIOUS

PDF

85.3 KB Created: 2021-09-16 11:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ad045c1a82d88523d448352a1e247087 SHA-1: 0e39ef7d35366a1e6471385b62ead6693df97ac1 SHA-256: d418162c2758c02cc6ee7da55850bbc37fbc8b86932dd5e9a90b56baf772af60
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://archism.ru/uplcv?utm_term=deezer+tv+premium+apk PDF link annotation
    • http://protectakoteasia.com/ckfinder/userfiles/files/7277967167.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/wazisexoguwu.pdfIn PDF document text
    • https://yifff.se/userfiles/file/karamapafarozakalun.pdfIn PDF document text
    • https://sealand-pptc.com/userfiles/file/20189929340.pdfIn PDF document text
    • https://www.sherpachristain.org.np/ckfinder/userfiles/files/20574584709.pdfIn PDF document text
    • http://slsnn.ru/content/file/46799677785.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/suwetojose.pdfIn PDF document text
    • http://www.reeder.ee/files/filemanager/51845326854.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/zolilapulerixokatevi.pdfIn PDF document text
    • https://rafautama.com/uploads/file/robebatonef.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/26453684104.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/bijabuveborarobokeviga.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614033d06d4d5---1403716995.pdfIn PDF document text
    • http://adimhukuk.com/resimler/files/kadanovobuvibuv.pdfIn PDF document text
    • https://nutrishop.in/ci/userfiles/files/65861837287.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/basabeg.pdfIn PDF document text
    • http://petgears.com/app/webroot/files/file/51560451456.pdfIn PDF document text
    • http://bratislava.topenglish.sk/app/webroot/gallery/files/63344971043.pdfIn PDF document text
    • https://akgoz.zemta.com/uploads/files/69597740590.pdfIn PDF document text
    • http://thebodyclubonline.com/userfiles/file/jivofez.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613cad823922b---62467313624.pdfIn PDF document text
    • https://rugerwafers.com/demo/ruger/beta/userfiles/files/33617226501.pdfIn PDF document text
    • https://hoatuoi360.vn/uploads/files/tetapo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8F 20020 bytes
SHA-256: 821c8e5a4ac334d898113c98e7b95a0b16d642c1fc65ef4e9765a6846cc6ab55
font_02_sfnt_off000130a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A2 10296 bytes
SHA-256: 817dae3618d7182f59ceffe1558aa98531dd86e1c5abeb0932685275e6991f1c