Malicious PDF — malware analysis report

Static analysis result for SHA-256 9418059988db2e18…

MALICIOUS

PDF

94.2 KB Created: 2021-07-20 18:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b49ec4063d0d859e3e54df84b224ba75 SHA-1: e6c37e99cc2bafc7a43a4d7241d7657d1a81efbe SHA-256: 9418059988db2e18b68692f6645a372c42185bb3442a9941663a41b9b6b8204f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a98902f30d4---bezuvijijeripe.pdf
    • https://anmoul.com/userfiles/file/82577720106.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8ed8b68d0---rumuzudovexiwolemos.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d06d95500b6---79011917749.pdf
    • http://chikatere.com/Upload/files/sinit.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/841347c722ad3508ddeb0cc0ce6cd5d5/gazuxiroxuma.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/bj6fhfvvj3oampfsr057p06sj3/posenu.pdf
    • http://sequirk.ie/userfiles/file/pozutajire.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/21494934eb0a3945a71d2c65fa5303d3/tolupuz.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160acc8b1d0c6a---32427240150.pdf
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/73075632755.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/7200263cce251430e0612696acd0a77e/medipidijesowafowaraba.pdf
    • https://akamercedes.com/images/uploads/files/58249234089.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d19a85bf375---fikat.pdf
    • http://thesprotia.gr/uploads/file/90951523687.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608692a61a7c7---muwuneluletenurijim.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/03f4d7ddcde072b53fca89361b085b90/88148480890.pdf
    • http://drukarnia-warszawa.pl/pliki/file/dudemifivogij.pdf
    • http://bomtvplus.com/data/board/file/20210513025151.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/aoafr13h0ceb6lmol04585dv27/demamewujezusenatiwebeg.pdf
    • http://archerelectricsupply.com/userfiles/file/timewalepubir.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e50c0f85695---33456238161.pdf
    • http://tourister.kr/userfiles/file/bipofuvabopa.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608831ca2f1cb---97444570550.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=on+time+delivery+self+appraisal+comments
    • 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_off00010db6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB6 16792 bytes
font_01_sfnt_off000125cd.bin
2801fd4a097e2d1f56553a213896711f095cbcdcad852eae9059c0dd89beef02
pdf-font-stream PDF embedded font (sfnt) at offset 0x125CD 10984 bytes
font_02_sfnt_off00013f5d.bin
97437eee020d396d5fed1b9ec9f02ebd474b0c6f16b4eda82849ae2513b30ef7
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F5D 16868 bytes