Malicious PDF — malware analysis report

Static analysis result for SHA-256 d038307e4ede17eb…

MALICIOUS

PDF

77.4 KB Created: 2021-03-27 23:36:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8932da54b1b80a9ce1894d16c4579986 SHA-1: 596695edfa854e594f82f3878b205c3bd09f1fc2 SHA-256: d038307e4ede17ebf5814129cbbc71d14882bc35816b368ed6886058d89dbff9
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://crophysi.ru/strik?utm_term=panasonic+multipurpose+rice+cooker PDF link annotation
    • http://shop-you.xyz/maksud_agama_islam4ueq7.pdfIn PDF document text
    • https://tokinuxo.weebly.com/uploads/1/3/4/8/134848772/b6663749.pdfIn PDF document text
    • https://cdn.sqhk.co/murajefovel/ijPhisf/brick_breaker_space_outlaw_apk.pdfIn PDF document text
    • http://fdvsefwfrw.space/boat_lift_loading_guides0hnpn.pdfIn PDF document text
    • https://cdn.sqhk.co/telazaje/tidREu5/91941471691.pdfIn PDF document text
    • https://cdn.sqhk.co/letopoto/jf7bJzw/moto_traffic_race_2_multiplayer_mod_apk_home.pdfIn PDF document text
    • https://cdn.sqhk.co/rezeribevi/jcvhoid/85326763768.pdfIn PDF document text
    • https://cdn.sqhk.co/pulobegefuzi/jaieXbQ/rivovajenot.pdfIn PDF document text
    • https://cdn.sqhk.co/kevovevude/ijfmFha/adamant_pickaxe_osrs_ironman.pdfIn PDF document text
    • https://bupaduzisi.weebly.com/uploads/1/3/4/4/134475958/9676313.pdfIn PDF document text
    • https://murejisigutive.weebly.com/uploads/1/3/1/1/131164542/judaxewipofufiruzom.pdfIn PDF document text
    • http://mercelus.xyz/compress_online_to_less_than_50kb7awle.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/gejigeo/custody_detention_officer_uniform.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
    • http://lejimilegekire.rf.gd/saeco_talea_giro_plus_manual.pdfIn PDF document text
    • http://fomuzuzidoduvi.epizy.com/13575028760.pdfIn PDF document text
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_f27edcba7faf40e8b022dfc4cca4c6da.pdf?index=trueIn PDF document text
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_88e23a2cb12542c6ac6d9361a90654e9.pdf?index=trueIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_0c64796976174063bb6a2b0d7db43427.pdf?index=trueIn 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_off0000e5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DB 5024 bytes
SHA-256: da0a11e4271390d0795bd78e185f709f708ab7479c3a98ffa2f3b48c75fb93ed
font_01_sfnt_off0000f6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D1 10484 bytes
SHA-256: 9fd82fb0b0b62a14932ba046f652da8338c1e15662fa9eebcc81d3c848545f86
font_02_sfnt_off00011aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA6 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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