Malicious PDF — malware analysis report

Static analysis result for SHA-256 d355ad5983133f82…

MALICIOUS

PDF

77.1 KB Created: 2021-03-02 12:18:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 43d411ae0b22a3ba9d6a052973382cbd SHA-1: 9ad63da4cd8b99db1efd55ce4dca64e78fcad0ea SHA-256: d355ad5983133f820e124bdf0a5d17c06d1010529e1bc4f3173164f453fcd9b3
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 pointing to disposable domains and Weebly hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of a specific URL related to 'pokemon fire red cheats' indicates a lure to attract users interested in game-related content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://jumiwimov.ru/strik?utm_term=pokemon+fire+red+cheats+walk+through+walls+code+breaker PDF link annotation
    • https://cdn.sqhk.co/xalibolopov/8hgTibp/kerokotumakitimazeridixol.pdfIn PDF document text
    • https://tenimuleletef.weebly.com/uploads/1/3/4/3/134343202/rotonup_vifiwuguvikipar.pdfIn PDF document text
    • http://olymp-trade.top/dubilorntrug.pdfIn PDF document text
    • http://secureappeal.com/voresomebuvonaburezudawijlhdz4.pdfIn PDF document text
    • http://winoorama.site/24235786457392tm.pdfIn PDF document text
    • http://banademebilite.sportsontheweb.net/finding_volume_of_prisms_and_cylinders.pdfIn PDF document text
    • https://valexipeval.weebly.com/uploads/1/3/0/7/130775413/nizarexim.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/gjifhgD/lords_of_empire_elite.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/gh9y9w1/super_cats_cartoon.pdfIn PDF document text
    • https://cdn.sqhk.co/kulizuxekume/JIheZid/pubigitezamok.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/hbZggJm/xtreme_soaring_3d_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/powitaxixu/ejgiiLq/radiant_floor_heating_cost_canada.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kujesulad/widule.pdfIn PDF document text
    • http://lanosebezazov.onlinewebshop.net/swann_security_camera_system_user_manual.pdfIn PDF document text
    • http://bumurulepowele.myartsonline.com/32608381605.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/searching_for_sugar_man_album_free.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_off0000ed75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED75 5732 bytes
SHA-256: f1d31c89e3228c0826196cea0cbd84bed2f1e67179c30a3b996b4347a04832fc
font_01_sfnt_off000100ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EC 11192 bytes
SHA-256: 7ff8b8f1e2e61a832cb3173e96052ca943dc41a6626d54cbeed5bbc6b774d15d

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