Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af682ad047fd0ec…

MALICIOUS

PDF

152.5 KB Created: 2021-06-29 21:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9c949b6b386f407ae008bf7b1a9f705b SHA-1: ce4b212522ba10a0ca5dec32dba71d68dca105ac SHA-256: 6af682ad047fd0ece35a4dc4abb12e83de968f0a6e6e6a8cf98b239ed21d6eac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the link farm structure is a common tactic for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pass-eco-energies.com/ckfinder/userfiles/files/36859418478.pdf
    • http://bumsnab.ru/uploads/files/4508671839.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e366f57bf1---54724012598.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/72pkvd0b77oef1sj2ealda04o5/tatugupujofekit.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073c792a177d---69834513864.pdf
    • http://atek-ent.com/upload/file/rugapexav.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a55c7057aa---vapenamuxenakekevoke.pdf
    • http://www.ecvbrass.ch/user/web/file/wibun.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/73282dbdc3950f088fdb02d02a01147b/84830943979.pdf
    • http://sun-green.be/ckfinder/userfiles/files/pavuredudejemijatebegada.pdf
    • https://telewebmarketing.com/FCKeditor/file/momuxo.pdf
    • https://bangprice.combangprice.com/beta/cms_image/file/kivejosibazedako.pdf
    • http://airconbank.com/upload/fckeditor/file/64911871829.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927b8f4f495---68240770050.pdf
    • http://esipro.lu/userfiles/file/gujesupogewo.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a568868824---65404313212.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e04e6a04e---nepilukuzoxapuladazegejes.pdf
    • http://deccanquest.com/konadnew/userfiles/file/2005113270.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/0mcdkfjfdqpgbse14q5liubeao/sarefebevovap.pdf
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/35265640416.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0dbdda39d---86256770848.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=the+different+angels+in+the+bible
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f82e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F82E 16792 bytes
font_01_sfnt_off00021045.bin
f3abfec4a2a6cee1615635a10341e15c00eaf059645583581ad91062c0bcab88
pdf-font-stream PDF embedded font (sfnt) at offset 0x21045 10616 bytes
font_02_sfnt_off00022837.bin
fa9356edef86c0eaba0e1405a501a508daee8b9a85a3953307e388d6b8cb1ae3
pdf-font-stream PDF embedded font (sfnt) at offset 0x22837 17224 bytes