Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fbf8a396fd80bf9…

MALICIOUS

PDF

74.2 KB Created: 2020-12-30 09:10:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ee4fb3bc3662f9d366a42282e960faad SHA-1: 73ada4a29c0cd285a52ca19a3257ce2356bec375 SHA-256: 4fbf8a396fd80bf9d5429dae89def70abcf187f692aa304426cc237733dd6e5f
154 Risk Score

Malware Insights

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

The file is a PDF containing a link to a known malicious redirector, traffmen.ru. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URL suggest an attempt to redirect the user to a malicious site.

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://traffmen.ru/123?utm_term=fallout+3+operation+anchorage+perks In PDF document text
    • https://cdn.sqhk.co/lixozimiz/YMhis05/1576523388.pdfIn PDF document text
    • https://cdn.sqhk.co/nenuguvan/ifpv1Wk/77010519781.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/Sjh7Vq8/like_videos_for_tik_tok_musically.pdfIn PDF document text
    • https://cdn.sqhk.co/jedelamodafa/jx3hcja/xspc_raystorm_neo_waterblock.pdfIn PDF document text
    • https://baginemesurewis.weebly.com/uploads/1/3/1/3/131380932/kufil-morub-gelibaru-jigatakolaru.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/xeturaredederog.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/jcCjhXE/pokemon_pikachu_wallpaper_1080p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2efbd9a6-d341-4e0c-8822-63eebca3f71e/innova_factory_store_coupon.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/net_set_go_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d08b4280-421b-41ad-86a8-93ac3b148eef/50582542449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ab64296-a3b6-47a2-b8f3-db0321a7dd4b/80_minutes_en_heures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19cfda19-88c6-45fa-b073-5f6a2f8473d9/8695582773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84a52102-ddf2-48f5-8ca7-9ce8e1218a93/wofuloxumenijew.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_off0000e205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE205 5380 bytes
SHA-256: 5f245c16ad48d5b4ae70a3c42c61e037c34f4e340bc76ba4eda9437b2bbf342d
font_01_sfnt_off0000f44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44E 12104 bytes
SHA-256: f45667f4ce8b16589cbfca182e6830af45ffaff815f9c0b5440b4a913823d672

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