Malicious PDF — malware analysis report

Static analysis result for SHA-256 f95687180ce2fa61…

MALICIOUS

PDF

64.9 KB Created: 2021-01-10 23:23:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b702e28402f5d45b6aaa2f0234b11f26 SHA-1: ea2e5865d17be48abef598d21c60d6ca78beae02 SHA-256: f95687180ce2fa61ae672043350418b67a1965a87fd876a1ab74a1e46b99f950
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/123?utm_term=nolin+lake+ky+fishing'. This indicates the document's primary purpose is to lure users to a potentially harmful site. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link strongly suggest an attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/123?utm_term=nolin+lake+ky+fishing In PDF document text
    • https://site-1171990.mozfiles.com/files/1171990/rirusebeserezeserowazef.pdfIn PDF document text
    • https://cdn.sqhk.co/xejoxoka/dThdogf/8006218610.pdfIn PDF document text
    • https://site-1177842.mozfiles.com/files/1177842/behance_size_guide_2018.pdfIn PDF document text
    • https://site-1175937.mozfiles.com/files/1175937/horizon_classes_moradabad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409093/normal_5fc533c779609.pdfIn PDF document text
    • https://cdn.sqhk.co/taxeseta/aFjhhb4/xazizebawaruvuxosonaroneg.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/hchcgcW/biwaritelogomowa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f985b63de37b.pdfIn PDF document text
    • https://site-1171554.mozfiles.com/files/1171554/offroad_legends_2_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/nurofiwele/fichHif/cute_hairstyles_for_girls.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421640/normal_5f9c3994b3d14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5f8a96037d111.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC17A 5068 bytes
SHA-256: b1b5e74c65a9235dd7a35ab5c17103371b9c6cacc9991373515d56e786e9a916
font_01_sfnt_off0000d2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D4 10604 bytes
SHA-256: d72bb475210ac1ab2dfd2f4e8e31b2f5ee3441b5a686bc21f1419c72b543f169

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