Malicious PDF — malware analysis report

Static analysis result for SHA-256 804ba80678c8b718…

MALICIOUS

PDF

99.8 KB Created: 2021-05-23 08:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 8f57ab4815b07b7d9bbda4ad6f52780f SHA-1: 2e13796d4ab328536217a088a71d1e5d36d201bb SHA-256: 804ba80678c8b71874e99acfa4f961c3ca886f4009fba68cc947ac082b96f9f3
156 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 other PDFs, suggesting a link farm or SEO poisoning tactic. One of the primary URLs, 'https://lozipotod.ru/strik?utm_term=best+size+crate+for+german+shorthaired+pointer', is likely a malicious redirection. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://lozipotod.ru/strik?utm_term=best+size+crate+for+german+shorthaired+pointer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469860/normal_602b3735dde60.pdfIn PDF document text
    • https://faxarumi.weebly.com/uploads/1/3/1/6/131606834/2904791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476302/normal_6054eab52197f.pdfIn PDF document text
    • https://gijajagilaz.weebly.com/uploads/1/3/5/3/135313732/edd8fd0c3e97.pdfIn PDF document text
    • https://pazunorafozide.weebly.com/uploads/1/3/0/7/130776571/bea8527cd46bb8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382620/normal_60571a72a4ea9.pdfIn PDF document text
    • https://wuvumivew.weebly.com/uploads/1/3/1/4/131410662/wezuro-fugivulukisaxi.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/bufexa/49839066050.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/blackberry_q20_classic_price.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/nozumeka.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/sowonetafevitogugejozed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50775456-f18a-403b-9078-afa041c80ffe/raxuxinedawosexigukud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/708ab398-3d7e-4c62-9a0f-96e8d0131319/kasowirufavo.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/candle_wick_guide_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/usps_form_3600_ez.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/28619990345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f014314e-1e3f-4ae6-a759-c1e7c9e3567e/2006_kawasaki_bayou_250_top_speed.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/alphabet_coloring_pages_a-_z.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/how_to_unlock_minn_kota_ulterra_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d24a6ed9-50ec-4f1f-a664-649d5ead0119/48143779927.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_off000146a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146A4 5636 bytes
SHA-256: a0fe89264f74060b8d01c5844b8c9ed65e9205690b4b0022a6915b7efcdd82e4
font_01_sfnt_off000159b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159B6 11744 bytes
SHA-256: cdfd3beadbf180a18c5521bf2c5501f017547458aaea3b9ac2697dfbdb0535a0

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