Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9045e195137168…

MALICIOUS

PDF

77.1 KB Created: 2021-03-02 00:33:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d5040332f4deea96391980da3ddb0f6e SHA-1: e9bc26f398d39d6519de57ea6458addc15406ba1 SHA-256: 7e9045e1951371684c97e0709db0c0d76d6ca23e6378b4c45d9fb5b85948e425
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/wix?keyword=robot+vs+zombies+mod+apk+download PDF link annotation
    • http://chambreop.xyz/20949438673vh3fi.pdfIn PDF document text
    • http://topsalon.xyz/how_to_start_your_own_small_lawn_care_businesskvcmq.pdfIn PDF document text
    • http://kiwirixup.22web.org/raxapajepa.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/Ts2Z8hj/57540653771.pdfIn PDF document text
    • http://noksipals.online/biblia_mas_antigua_en_espaolx99nf.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/3Fjg1di/water_parks_in_florida_with_mermaids.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/cGhdQjj/zatafej.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/ififiep/51771491605.pdfIn PDF document text
    • http://topchambre.xyz/play_store_for_pc_without_bluestacks0kb5t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/42051694907.pdfIn PDF document text
    • http://talaxevavilur.rf.gd/can_you_move_directv_genie_to_another_room.pdfIn PDF document text
    • http://modudupudabu.rf.gd/39101414435.pdfIn PDF document text
    • http://renureva.epizy.com/27204523235.pdfIn PDF document text
    • http://vebavibokifoko.epizy.com/72103263307.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_off0000e52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52D 5420 bytes
SHA-256: a9d8e463db6d4c56e49a0da4303d08053ce5836a01d9b792b1ae8708c4b69048
font_01_sfnt_off0000f79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79F 2636 bytes
SHA-256: 35bb435acf40d145cbbf078ebc4f4c60b5fb1128909fa2498efe8de98f54e43d
font_02_sfnt_off000102d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D5 10736 bytes
SHA-256: fb2eee6c342aae3be2365f8722b2f5f0bb3b61476976b2870986add29f77d879