Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabfca3f28a37157…

MALICIOUS

PDF

66.1 KB Created: 2021-01-24 20:02:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7de818452414c3f371be660a8f35f2f8 SHA-1: d2221b362f66edfd2937900fa3767b8f7b786770 SHA-256: fabfca3f28a37157b10d86ae1afcaa7cd4023f4650579a0fa9ec07de6c33801c
162 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 'traffmen.ru', which is used to lure users into downloading content. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded URLs and the ClamAV detection further support its malicious nature, likely as a phishing or trojan delivery mechanism.

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffmen.ru/wb?keyword=cross%20stitching%20magazine%20free%20download In PDF document text
    • https://static.s123-cdn-static.com/uploads/4380211/normal_60010923d0b06.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/ZRMYnih/five_below_locations_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410976/normal_5fd3cc4c2158d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451208/normal_5fe0cb746e8be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393204/normal_5ff50f7edaa96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388432/normal_5fd8cd453d96e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379241/normal_5fdc409d19205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389599/normal_5fd3bb4988487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419623/normal_5fe9eacd0b9fc.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/Lijchgp/mens_short_hairstyles_for_thick_hair_oval_face.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424647/normal_5fcba25342a42.pdfIn PDF document text
    • https://cdn.sqhk.co/xaxovowupofa/VoOBJea/tomando_el_pelo_en_ingles.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378165/normal_60009c77ba0e7.pdfIn PDF document text
    • https://cdn.sqhk.co/zupitefa/jeghgig/tiktok_anime_filter_snapchat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gefuxexo.epizy.com/best_cheating_apps_android.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_off0000c5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F7 5480 bytes
SHA-256: 742b6aa1dfbedb785af0ba39d343ffd4297548a38c204476ebdf79604aa1efb2
font_01_sfnt_off0000d888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD888 10176 bytes
SHA-256: b516a3a36ed669527a9e76a77ab38de2d3730c5a4fee786bb2a5a60f6f7205e3

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