Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fdcd12e03083643…

MALICIOUS

PDF

87.9 KB Created: 2021-06-27 03:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a765eb63e6167d7b4942aadfbecfb2b4 SHA-1: bab70c5853f6bfa0f02f8ede5ac49766676f0ed4 SHA-256: 6fdcd12e030836438b8c11e730a78df38f7c56bd6e91bd5d3f2c5d66e104425b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The document's structure and embedded links indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/48b2f02a2c11fa6aca0d9e13b95cc152/81588459281.pdf
    • http://schodylux.pl/userfiles/file/bomumisew.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075225c550ff---90283760146.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/n0ldgsmd3rksqt5tbio8k6hbbg/36966697590.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0257c9075a---migamexibeda.pdf
    • https://indobaliart.com/sitefiles/file/77393267273.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080371460679---kipijadimuvuzawodejozun.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/c033808f3cce921f0ed89dbc47390df9/supizexosajazumusosimumef.pdf
    • https://cafemocion.com/userfiles/file/zitunuw.pdf
    • http://cn-noah.com/uploadfile/file/kexelimigogol.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609fea5387302---sabalo.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/c672f62e46a6dd155b3d192eef5644a9/51703587912.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed12183294---sojuluzoganevisikuvexe.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/750ed843e19406e3e0340c9320ef1b42/87617538658.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d6c05426227f8b54548f98588b1bb4c1/88180223311.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2cb2abcbba---vivumuwakifinasofexazukok.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b6360378149---folawikovux.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3481d40137---ravusiwebufuzomuli.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752c9c1354d---woxapomat.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/17caf4f7bb90df34ba4ef735529c3ff3/22635922084.pdf
    • http://poongdung.com/FileData/ckfinder/files/20210613_3F761830D2314FF9.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/2muti2p2b0ec6q3evfgomlf1c4/betir.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/psds957pp919e5aiik3jhjmcn0/75017649244.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/63t6jrip4jiei02benvlg5l32i/jajosewarukuke.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5b894f7d9---taseku.pdf
    • http://basaritarim.net/admin/editor_resim/file/81418061379.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=rhymes+with+know
    • 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_off0000f61a.bin
d74c130e4e364bbd97cef3e4b417a8afe6411962dca4a8fcbfdadd54b1d32ecc
pdf-font-stream PDF embedded font (sfnt) at offset 0xF61A 17156 bytes
font_01_sfnt_off000122dc.bin
41ae0e30bb320bfc53957f3867c6aa723dd8a8c89dd5d067094459eb67ef2310
pdf-font-stream PDF embedded font (sfnt) at offset 0x122DC 10404 bytes
font_02_sfnt_off00013a56.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A56 16792 bytes