Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f5235138eab040…

MALICIOUS

PDF

76.5 KB Created: 2021-02-16 07:19:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: eddaea5e4065c75be3822268a9f8e887 SHA-1: 1b33f631317f537f988d841d0ed0cb307fa505b5 SHA-256: 59f5235138eab040f4c5d12ebef9b027b66658622dd5258d97e4b06b3401b8b1
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, contains a URL that appears to be a search query, further supporting the lure-based attack pattern. ClamAV and ML classifiers strongly indicate maliciousness, likely related to phishing or malware distribution via these 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://seumenha.ru/wb?keyword=how%20to%20put%20hmdx%20jam%20in%20pairing%20mode PDF link annotation
    • http://medesutaduj.22web.org/structure_elucidation_of_camphor.pdfIn PDF document text
    • https://cdn.sqhk.co/rabuvimi/ibfgcib/evolution_invasive_species_examples.pdfIn PDF document text
    • https://guvefivilemu.weebly.com/uploads/1/3/4/3/134397682/butabasokum-tekuw-wixepivix-sewinor.pdfIn PDF document text
    • https://dorubirema.weebly.com/uploads/1/3/4/3/134317311/1fe47106f.pdfIn PDF document text
    • http://kamaz-ftc.com/xuveputethnzvm.pdfIn PDF document text
    • https://cdn.sqhk.co/bezorufuv/hihc21L/curry_guide_pokemon_sword_and_shield.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/ia6hhgX/city_racing_3d_apk_download_uptodown.pdfIn PDF document text
    • https://bafuvigugasud.weebly.com/uploads/1/3/5/3/135308410/d931c.pdfIn PDF document text
    • https://cdn.sqhk.co/zeburozupax/dggKyod/85319969080.pdfIn PDF document text
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/kiteferutol_mokewavume.pdfIn PDF document text
    • https://cdn.sqhk.co/tijatabov/hcjdaex/73303983775.pdfIn PDF document text
    • https://cdn.sqhk.co/lilavokolet/VujhjUX/gutiliwajowejaluzig.pdfIn PDF document text
    • https://memagakotis.weebly.com/uploads/1/3/4/7/134760483/198b3fd7d8.pdfIn PDF document text
    • https://cdn.sqhk.co/bevoletef/VtoLJij/hello_beautiful_body_wash.pdfIn PDF document text
    • https://vojimefijizudi.weebly.com/uploads/1/3/4/3/134310580/da9bbd4df1.pdfIn PDF document text
    • http://ewop.space/pimojizuxenidololowizxbjnu.pdfIn PDF document text
    • http://skywonder.space/icao_annex_18_downloadnfegs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kizofenumuvuma.epizy.com/madoru.pdfIn PDF document text
    • http://tobobuximalusu.epizy.com/acceleration_due_to_gravity_worksheet_2._3.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_off0000ee1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1E 5360 bytes
SHA-256: 11a5d8fb3541885c37000d5b71dc663e8f284a5bead2e5bd19322c40bc8dbd25
font_01_sfnt_off0001003e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003E 10588 bytes
SHA-256: 5cde9ed6a6b4ef79c2867192d5253b7a1656ff0e2e9b4d55356e8119a5c5214f

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