Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f152fffbaeb0f7d…

MALICIOUS

PDF

74.2 KB Created: 2021-03-10 09:43:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0063794634c444f6b00bcdad1a3e909e SHA-1: 006ba8bcfc25064a98ebab5191d50a810e9222c9 SHA-256: 9f152fffbaeb0f7d2b83fd86db052c528fcf1986da7bd31b679c3b75745668b4
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a phishing or trojan payload. The PDF contains a large number of external links, characteristic of a link farm designed to generate SEO traffic, likely leading to malicious or spam content. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, a tool often abused for creating malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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
  • 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://nipisod.ru/award?keyword=angioplastia+definicion+pdf PDF link annotation
    • https://cdn.sqhk.co/sirojenu/iZIqmia/dragon_mania_legends_legendary_breeding_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/jhscjcZ/mcintosh_speakers_xr14.pdfIn PDF document text
    • https://cdn.sqhk.co/pawosuku/1pgcCgf/69605210975.pdfIn PDF document text
    • https://cdn.sqhk.co/vimanagadu/gcgi460/60969651900.pdfIn PDF document text
    • https://cdn.sqhk.co/zapusukajev/hhAgWhc/movie_maker_free_video_editor_for_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/genazeres/jcgiicQ/58437352873.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/cMtibBJ/wordscapes_in_bloom_level_993.pdfIn PDF document text
    • https://cdn.sqhk.co/kelanadu/6v0EgO6/88462991635.pdfIn PDF document text
    • https://cdn.sqhk.co/zimajigon/fMLaUor/momoxolewulepodoperib.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/ZjgWhas/74699480499.pdfIn PDF document text
    • https://cdn.sqhk.co/daborofus/duBhcnU/wallpaper_hd_for_pc_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/mevexobuzur/iQidihL/plane_craft_square_air_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wedegetuso/eOhbidU/nfl_cardboard_cutouts_price.pdfIn PDF document text
    • https://cdn.sqhk.co/tisewesir/ghABCok/jalejefem.pdfIn PDF document text
    • https://cdn.sqhk.co/kokojisip/djegdVe/gebofezile.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_89c504dbbaba457691002416df15e6c4.pdf?index=trueIn PDF document text
    • https://a4758657-6aaa-4003-b0f6-1957e800abfd.filesusr.com/ugd/70c1f8_bf0253e8954b40ce8f088aceec026581.pdf?index=trueIn PDF document text
    • https://6b5d12f1-3bbc-48af-9ddb-5430d2fe15e7.filesusr.com/ugd/3bf302_56b733ef2b1a40efa78103f1f356822f.pdf?index=trueIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_4fb6394d2a934862a4700d58da745911.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gurafoga/47885219599.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_off0000e739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE739 5216 bytes
SHA-256: d884a1d0b2f667a4ed096ce321f73a13092a3019d87eb4d89c79c151763179ad
font_01_sfnt_off0000f919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF919 10128 bytes
SHA-256: 48ac04658b6c88e48ea3563288ea9e03d46ce699142f94ed94f4da8950451793

Open this report in the interactive analyzer, or submit your own file for analysis.