Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc3583a255b9ac03…

MALICIOUS

PDF

70.0 KB Created: 2021-03-15 07:14:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c9291a81a20e6a99c6115476acdbac4e SHA-1: db59588233574228f3ce2ad1b0590662ee7217d8 SHA-256: cc3583a255b9ac03669382b9c1b892f816a4090d871290f73cdedfa29973579d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://nipisod.ru/wix?keyword=papa%2527s+pizzeria+near+me PDF link annotation
    • https://kagivosivozavex.weebly.com/uploads/1/3/4/7/134746508/8164456.pdfIn PDF document text
    • https://cdn.sqhk.co/woteruzid/jgXjiLP/learn_ballet_at_home_dvd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381297/normal_6034e1a50c369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421615/normal_5fd8567bd1b0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452834/normal_5fe1509b7598d.pdfIn PDF document text
    • https://pakowojazawari.weebly.com/uploads/1/3/0/7/130775116/4874962.pdfIn PDF document text
    • https://cdn.sqhk.co/fupokonabat/zwhgjih/pejesanamakusinilidar.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/ACgihPg/14672832945.pdfIn PDF document text
    • https://cdn.sqhk.co/nawafoxobok/Zuh4k1f/nanananitadoxobem.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/cFPhgKs/raid_bosses_november_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486193/normal_6040e3ae37d88.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/haheigw/guess_the_movie_game_bollywood.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/jek3mgc/matrixyl_synthe_6_serum_vs_matrixyl_3000.pdfIn PDF document text
    • https://givetowa.weebly.com/uploads/1/3/1/4/131437183/tizavebu.pdfIn PDF document text
    • https://binapesod.weebly.com/uploads/1/3/1/4/131438069/zawixivevudeb-bafexa-xisix.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/vabedafozo/grinch_christmas_card_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/burnt_plywood_sheet_flooring.pdfIn PDF document text
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_fb62664ef4764f09851c2650b2ed5be1.pdf?index=trueIn PDF document text
    • https://4328a374-8b5c-4134-9cef-e132ca5fc89d.filesusr.com/ugd/6732b1_b57e7296cf7c4ae6b0a7a5d4ced90db6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/74737233799.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/bangladesh_online_passport_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/gejob.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_off0000d2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CC 5016 bytes
SHA-256: 40ff795ae2bec7fe791178be401d27eef6d8166b5915bda11daacde82beb19aa
font_01_sfnt_off0000e3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D4 11588 bytes
SHA-256: 8db88e82d996e3683a5a755a8ee0853de99a3946bb68a186142ce2ac301fa204

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