Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c01e72d26eb0ab…

MALICIOUS

PDF

75.5 KB Created: 2021-03-08 18:47:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: dc561ce6f91da52fc7e9de0c81ee82ff SHA-1: bb6826337dd788c5a06621dac67cefa089306a4e SHA-256: e7c01e72d26eb0ab565442f41bd1701f2b1ce930ac818ef54a3bd225b5bcf6aa
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm on disposable hosting. The document body, though heavily obfuscated, contains references to 'Barfi kannada full movie hd' and 'wkhtmltopdf', suggesting a lure for users seeking media content. The numerous external URLs point to a distribution mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/123?utm_term=barfi+kannada+full+movie+hd PDF link annotation
    • https://cdn.sqhk.co/jukowejazus/4xpfibG/48050588241.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/jiNEhd3/anko_wooden_rainbow_stacking_blocks.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/5132231444m5a76.pdfIn PDF document text
    • http://marketitaly.pro/how_to_link_dish_hopperixdvl.pdfIn PDF document text
    • https://cdn.sqhk.co/nitagalut/ahd3hiw/beli_pulsa_listrik_dengan_gopay.pdfIn PDF document text
    • http://bigno.space/idle_car_tycoon_mod_apk_1._19f5vac.pdfIn PDF document text
    • http://899themes-demo.ru/37243550274l4wby.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/18773216255.pdfIn PDF document text
    • http://cherrypimp.online/lelujefuzili6rfha.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/PDYbNie/39447266012.pdfIn PDF document text
    • http://chebsvet.ru/zunebapuwn6mc.pdfIn PDF document text
    • http://copyrightproblem.com/kibixefekirujegifoloexnvq.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/Egijjie/school_ultimate_studying_assistant.pdfIn PDF document text
    • http://lagefimuzupu.22web.org/eia_report_example.pdfIn PDF document text
    • http://trokot-shopnew.online/24430128553nvrxk.pdfIn PDF document text
    • http://grantmedica.ru/janajajumigixezevasidimirgndzv.pdfIn PDF document text
    • http://ubsvp.com/jalulimunedile97vuh.pdfIn PDF document text
    • https://cdn.sqhk.co/tawibonikigo/A9pEiak/4638679993.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zerodawoti.rf.gd/wowolajevakisovetexi.pdfIn PDF document text
    • http://kizosala.epizy.com/gatefusuvaj.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/search_google_images.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/tasajukexabubo.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_off0000e5f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F1 5140 bytes
SHA-256: eac612b04190e85280f53511a3d0791a8528ab90e90a8842b0f49d42c3d93441
font_01_sfnt_off0000f74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74C 12492 bytes
SHA-256: 00e842d4d441f7ffd35cec0732b475c6acb53f91734ca4aa7a0134438c42934f

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