Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a09f497d7543ad…

MALICIOUS

PDF

82.8 KB Created: 2021-09-17 23:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e2cb5e0c34a3071e70fac0a2c8805da0 SHA-1: d1bc3d6d1a893dc5600d1be0a2e5b98f528a52d9 SHA-256: 80a09f497d7543ad78a8494a4bb534c6c07d2115e56a586bd97b3414add31c4c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many hosted on disposable domains, suggesting a link farm designed to obscure malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=how+to+change+the+version+of+android PDF link annotation
    • http://corkpotters.com/images/53810026352.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/58135022396.pdfIn PDF document text
    • http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mijibu.pdfIn PDF document text
    • http://lakshimi-kaatsu.com/user_data/packages/default/imgfiles/fimapifajiwumebube.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/5206619803.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/wonunubuzaso.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/13560848329.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/mokizorawenorepak.pdfIn PDF document text
    • http://madinaboys.com/easydo%20v2.00/files/uploads/1558094729.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/11bfd0baed38c5b2419a0eff238878bf/15509837507.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/18921650563.pdfIn PDF document text
    • https://www.hkha.com.hk/ckfinder/userfiles/files/pefujapaxesad.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/moragatokamozodabigolumem.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/49405009231.pdfIn PDF document text
    • http://pagyesa.org/userfiles/file/20210914081431.pdfIn PDF document text
    • https://sledovani2.gpshlidac.cz/www/userfiles/files/xovege.pdfIn PDF document text
    • https://bccphil.paramedix.biz/uploadfiles/file/banitabite.pdfIn PDF document text
    • http://luligang.com/ckfinder/userfiles/files/81580240988.pdfIn PDF document text
    • http://cavusofis.com/images_upload/files/kasofu.pdfIn PDF document text
    • https://aletihad-group.com/userfiles/files/63267951779.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c68e929075---66038228490.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_off0000dec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D2 17664 bytes
SHA-256: 64265208f57085444e339c4b93141a4962230d797e44f561187b0f6a9eda2d22
font_02_sfnt_off000124b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B7 10852 bytes
SHA-256: 5a5f9b47f98523922c19cf191c8a0df20c044959596e04fde68d312e5882789b

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