Malicious PDF — malware analysis report

Static analysis result for SHA-256 5548369cf387d164…

MALICIOUS

PDF

74.8 KB Created: 2021-02-26 06:42:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 798932891d2f1833e9ed9ab216d0ce48 SHA-1: 0d072e8d9653a56a3f694945925862d5b9be1779 SHA-256: 5548369cf387d164e3664be5008656b7e7410012ccd53f65a3b11eb47bf230e9
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The document body mentions 'Dell 1905fp driver', a common lure for phishing or malware delivery. 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-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.
  • 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://leonvi.ru/strik?utm_term=dell+1905fp+driver PDF link annotation
    • https://zejinimab.weebly.com/uploads/1/3/1/8/131856072/deriwakak_pasumux_niwatuzekalobev.pdfIn PDF document text
    • https://lowaribopuvege.weebly.com/uploads/1/3/2/8/132814272/wikarumibeset_pezuzo_wujonuw.pdfIn PDF document text
    • https://fiwozipuwawew.weebly.com/uploads/1/3/0/8/130814157/eb93bcb2.pdfIn PDF document text
    • https://dolilufaxeni.weebly.com/uploads/1/3/2/6/132683246/fa974d26452853d.pdfIn PDF document text
    • https://jukaregexiw.weebly.com/uploads/1/3/2/8/132816195/lupavinire.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/jixerubowi/content_management_system_website_templates.pdfIn PDF document text
    • http://bodumenijos.epizy.com/9apps_2018_new_free.pdfIn PDF document text
    • http://sixiwojiti.epizy.com/13110974100.pdfIn PDF document text
    • http://nifuxezelepet.epizy.com/2018_statin_guideline.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/classical_guitar_sheet_music_free_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/pitney_bowes_postage_meter_not_printing.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/the_town_movie_tamil_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/12094251572.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_off0000e807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE807 5180 bytes
SHA-256: 55fc9e5d79745127b6c3cea4f3f84792776666536827d6ccfddad4cdb53a5513
font_01_sfnt_off0000f9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D4 10820 bytes
SHA-256: 55de92725abdbe9c24c368bb53b7a29d821aae3c65713789631ef27025f06ef3

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