Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0040af553d627c3…

MALICIOUS

PDF

65.5 KB Created: 2020-12-25 09:53:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 16faf60df94b340f486106796c5cc8c6 SHA-1: d0f76fc9ccff76de1f465e86efc7f2b102b90fce SHA-256: f0040af553d627c357078fab9a5454196d2a19bc4940546e682a3693dce75ed3
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://traffmen.ru/aws?utm_term=chernobyl+subtitles+hbo'. This URL is likely used to deliver a malicious payload or redirect the user to a phishing page. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=chernobyl+subtitles+hbo In PDF document text
    • https://cdn.sqhk.co/vopufepivipe/juggrl5/70937835902.pdfIn PDF document text
    • https://cdn.sqhk.co/letojeka/8idntjc/juvosivavas.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/3b3cidH/6396374614.pdfIn PDF document text
    • https://cdn.sqhk.co/guzunilepin/lnhejc3/jetpack_joyride_2_player.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxumisi/gdahaBQ/dowimavofofika.pdfIn PDF document text
    • https://cdn.sqhk.co/sufadoma/iXK66gf/disney_sign_in_verizon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zunewidimem/civil_pe_exam_reference_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/gmat_official_guide_2020_free.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/mirae_asset_midcap_fund_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/71951750879.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/dslr_camera_pro_app_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/hp_camo_laptop_computer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB82F 4708 bytes
SHA-256: ba34e672933101b24cf86af7915a47c6e487c3babd13e09baf60aca8987da5ae
font_01_sfnt_off0000c829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC829 10152 bytes
SHA-256: 358fc5b395a57fd7af3f57c09fa6807bea222312b941eadbfc07a0b714cc7153
font_02_sfnt_off0000eadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADD 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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