Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e70fef7dc56f6a…

MALICIOUS

PDF

82.6 KB Created: 2021-09-22 21:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b60e8cb9d76604011a088747506aa716 SHA-1: eff6139e3d2a6052d8f976359f9cd8edb889aa84 SHA-256: 64e70fef7dc56f6aaac68bc986dd84bd63a46a5262927f81228c7712636a73d8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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 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://synerhu.ru/uplcv?utm_term=letters+to+juliet+watch+online+123movies PDF link annotation
    • http://teplospectr.ru/images/files/dadoxaki.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/madigorixizonolor.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/palezamimiga.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/61979683550.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/maliwomojo.pdfIn PDF document text
    • https://classykitchen.pl/web/uploads/files/8827711388.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/wijafuvuxekefudigobupopuw.pdfIn PDF document text
    • https://allianztc.ro/files/file/zerazofibaduselemeturovo.pdfIn PDF document text
    • https://eksiliotomotiv.com/upload/ckfinder/files/dawakikewosaxexal.pdfIn PDF document text
    • https://ashasuchikala.com/ckfinder/userfiles/files/lutasajetojatodireganomav.pdfIn PDF document text
    • http://thanhnhomdinhhinh.net/uploads/files/jakab.pdfIn PDF document text
    • http://puisan.ru/uploads/file/64685269532.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/vasixezasetuvomapatupaf.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rivujov.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/jebonoxatepuv.pdfIn PDF document text
    • https://inprovitargentina.com/ckfinder/userfiles/files/jelajoxuzawebiju.pdfIn PDF document text
    • http://siripanyalamphun.com/user_img/files/72737680747.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/sipipumuvitukepavevepufef.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/gofukorudelizetekinepit.pdfIn PDF document text
    • https://santaclara.com/wysiwygfiles/file/50426794505.pdfIn PDF document text
    • http://ergakiland.ru/files/files/lodetafewetu.pdfIn PDF document text
    • http://packagingandfoodmachinary.com/userfiles/file/zeraxorufefunixude.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/lb7fvnaul4k4n258rsf45gjq07/29331031828.pdfIn PDF document text
    • http://phongthuydotho.vn/upload/files/wekemetijelijulebuwatubo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF465 17844 bytes
SHA-256: a2c420458324f46377f91c8731d6b725c4073f06c16e17bd23c09e0767d48645
font_02_sfnt_off00012286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12286 11180 bytes
SHA-256: 43693675e9a10d1e2a0edd267fc94afe2bcecf24418ad72fafd35fcf45c2b2da

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