Malicious PDF — malware analysis report

Static analysis result for SHA-256 558471681f4c404f…

MALICIOUS

PDF

81.2 KB Created: 2021-03-11 12:39:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2a9020e663450518a388ea3e2fdd6a28 SHA-1: 63315a08da4dadc10e73c9ba9b8714a08aea39c6 SHA-256: 558471681f4c404f2ac463f61587f23a0a7390aa147d5cfe7a35f56dd34de85d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing or malware delivery technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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/wix?keyword=battlefront+2+weapons+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369793/normal_601eb9d2ba1e9.pdfIn PDF document text
    • https://cdn.sqhk.co/vasinabew/fQrHa65/fishing_hook_size_chart_in_inches.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426945/normal_5fd0ab412e29b.pdfIn PDF document text
    • http://specialsale.info/fojebudiporodj4ql.pdfIn PDF document text
    • https://cdn.sqhk.co/rekutadis/fd5VeKo/cloud_9_ranch_arkansas.pdfIn PDF document text
    • https://kunudixi.weebly.com/uploads/1/3/4/6/134667289/da82862e95809d.pdfIn PDF document text
    • https://pivatebovuwize.weebly.com/uploads/1/3/0/7/130775292/9871371.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392668/normal_603ee9c76a9be.pdfIn PDF document text
    • http://autoupgrade.website/87772396460n3yd2.pdfIn PDF document text
    • https://cdn.sqhk.co/vefutifeves/gdyvHn4/33156654835.pdfIn PDF document text
    • https://cdn.sqhk.co/jidobimatu/by8ifib/jegumosogud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417314/normal_5fdc761276d95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388279/normal_603484ab25026.pdfIn PDF document text
    • http://rasprodavaika.ru/mowinolo46wo4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421966/normal_60054d219c745.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491164/normal_5fffd0b925b0c.pdfIn PDF document text
    • https://xonasuxodu.weebly.com/uploads/1/3/2/6/132681295/wepiwarumurukajo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469626/normal_600957357c2ae.pdfIn PDF document text
    • http://coolmag.biz/how_do_i_put_my_samsung_dryer_in_diagnostic_modezq7sp.pdfIn PDF document text
    • https://sukanogijero.weebly.com/uploads/1/3/4/3/134333185/3631751.pdfIn PDF document text
    • http://allwoman.site/84318392044pr3x3.pdfIn PDF document text
    • http://instas.site/alien_isolation_mission_13_get_weapons_backjp9r5.pdfIn PDF document text
    • http://vk-settings-change.online/the_young_travelers_giftzhwk8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000100f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F6 5484 bytes
SHA-256: 0b83bd2988ba37d69ef40438805a6d04ed9e52ef9f5b5c6de3aaea999029fece
font_01_sfnt_off000113c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C8 10372 bytes
SHA-256: 2dab94059f14920977d2045a127733527ab4f2fc447b52f75a10c36b40ccce22

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