Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e30bee5528f76f7…

MALICIOUS

PDF

76.7 KB Created: 2021-08-20 05:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5cf30d3140845a793d55e1d4d5c1b4e2 SHA-1: 17ef0fa49a46a08b60808892f11594767eb2fa36 SHA-256: 3e30bee5528f76f7b348be9907d1de3fc741eed375aca98cab89587b19e39955
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to various websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing and malware distribution campaigns.

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
  • 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 http://megat.pl/uploaded/fck_files/file/90435544675.pdf
    • https://fallsplat.se/file/46583503608.pdf
    • http://monkey-do.net/userfiles/file/12688306617.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607435d82555d---wurekarivom.pdf
    • http://cloverpark1959.com/clients/51168/File/62939955232.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/c07bc6f22a46cc72e993266abd35ac70/47008668515.pdf
    • http://arndt-fahrschule.de/userfiles/file/nomotawopopusugotogetoto.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/j6t2m44cc73smkgenudue4bh0l/nupudoxumajenov.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c3413997bf10c67748f602b655d6e31d/vilole.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ed4d6de92---44091521826.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7173514c5---mapadiwipukej.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079dc0e7a002---zoderiropinuvidubu.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/db3tlaa4lhh8jaikci3rbt37on/fusewixorumeveniv.pdf
    • http://aircond.md/upload_fck/file/xexikirijowidekupopimibe.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e33a9f76d---zopoxivuzopinuwezi.pdf
    • http://sweetbasketsbyjackie.com/clients/864293/File/sijalavexozafixuzenone.pdf
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/836269433d9dea2f118547b7e1b8b667/lefisope.pdf
    • https://waelfawzy.com/userfiles/file/
    • http://alwaditrading.com/userfiles/files/liros.pdf
    • http://upsshop.ru/ckfinder/userfiles/files/20012372869.pdf
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/xonewulerunetub.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160be7c49925b1---jonujiwezafos.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0a69740fa---31882124443.pdf
    • https://markyatirim.com/resimler/files/kafifajumajilupemave.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=does+gorham+still+make+silver
    • 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_off0000c9e0.bin
03d8285f4902ef663ddb062fde3ae994c9e6a01b0ea63a10250b10f3275302ac
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E0 10612 bytes
font_01_sfnt_off0000e22a.bin
fa0509fee15fc4f26a6bdcb0d168a23c26ac294006e9604b6f77c1c3ed5feb72
pdf-font-stream PDF embedded font (sfnt) at offset 0xE22A 16344 bytes
font_02_sfnt_off00010c57.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C57 16792 bytes