Malicious PDF — malware analysis report

Static analysis result for SHA-256 b866400d9dda879e…

MALICIOUS

PDF

75.1 KB Created: 2021-03-08 19:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6d216e5c7ce20135acf188d5407399d1 SHA-1: 7f764c32669d06914f08b73c26990ed6a771e892 SHA-256: b866400d9dda879effa719eda0cb3631d0c4a0a9520f67517b065624be8742da
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains a link farm with numerous external URLs, many hosted on disposable domains, suggesting a phishing or SEO spam campaign. The document body, though malformed, contains a question about game controllers, likely a lure to encourage clicks on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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://dugedepap.ru/aws?utm_term=can+ps3+dualshock+controller+be+used+on+ps4 PDF link annotation
    • https://cdn.sqhk.co/tinolaseja/jaIthfV/boomerang_app_cartoons.pdfIn PDF document text
    • http://bufo.online/42795118837ftq4b.pdfIn PDF document text
    • https://cdn.sqhk.co/sunidoxil/ZgihdZF/meet_me_modded_apk_download.pdfIn PDF document text
    • http://p-kavkaza.ru/aluminium_sheet_metal_bunningsfwg8y.pdfIn PDF document text
    • http://vufarilijofo.iblogger.org/super_cycle_jungle_rider_game.pdfIn PDF document text
    • https://cdn.sqhk.co/wufotubi/tgiVhj2/hang_gliding_simulator_wings.pdfIn PDF document text
    • https://cdn.sqhk.co/wotabefej/jijgjim/61085906903.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_16c94e4d70e34bc2a86f8d053a35e9a1.pdf?index=trueIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_6e5c91b2b33541db9ef225dfd8e82a2d.pdf?index=trueIn PDF document text
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_b762666ccccb482db86376ee1d056951.pdf?index=trueIn PDF document text
    • http://logasizujonasi.rf.gd/70550293746.pdfIn PDF document text
    • https://3b044092-e341-4c69-a8e2-52b14fc1865f.filesusr.com/ugd/370021_0a389ef302824a1aae69024a81ba1304.pdf?index=trueIn PDF document text
    • https://a7193630-a032-4ee2-b136-33837135b76a.filesusr.com/ugd/fac845_44f119de2d7b4e44b7768ea6803e4157.pdf?index=trueIn PDF document text
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_f392d3f485c945bc9b5d60e44e30582c.pdf?index=trueIn PDF document text
    • http://saziwujezad.epizy.com/99_names_of_allah_video_mp4.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE949 5520 bytes
SHA-256: 7a889413f84ccb556cf70288ccb19a174555213af7e74deb7b2afeeb1a61c80a
font_01_sfnt_off0000fbfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFC 10392 bytes
SHA-256: 65ff3999e20ada7f8e46b343700ea189101e8c3f5945cc64f3c5471f3bfcf99b

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