Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9cb547eabb6fc6d…

MALICIOUS

PDF

81.4 KB Created: 2021-08-24 20:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b2a9d1fc6696886b4664ee4d989fabd3 SHA-1: 8bc179812cba33cf557aa625b04484ee22b7904c SHA-256: f9cb547eabb6fc6da6dfdc5cfb06d0fe4ef9d8d138a7f0cbdcebbb5528905794
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites, indicating a phishing or malware distribution campaign. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ClamAV detection and ML classifier further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/6b554bb8e2d0d67e7a14fcda9d5b55f3/64090807453.pdf In PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/07f2f5a71d95e2a6ab940ebd87874bea/21574551055.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/5d44c0515e07fea3186c27996b5300d6/zanokarimilulapokofu.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac6121dfb3---78666775944.pdfIn PDF document text
    • https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/fowopoza.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/t4rqauf8fte3vijjs4durjvqiq/35486939604.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/bibaludikunagalor.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/e5f0670aa9b432a3c65d4da94ca261b5/6657390235.pdfIn PDF document text
    • http://purifoy2020.com/clients/1/11/118d8b7ee1ea4bab8fb19da95c56260f/File/nabane.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/pabowatawokadowusu.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/265e5d68453850952f54378b3a2b2278/gopiva.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d028e3c4c3---tabenasisetubumuxidutes.pdfIn PDF document text
    • https://epiphanych.com/images/file/18482447032.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/1c576u2opgj30m2o39ekms4q33/28588038192.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/58604338051.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/wudinosafomusunowemuduvid.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fac24827c9c---mibok.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608d83585a3bd---purofemepuzowoduxori.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/fopesupenaxuzom.pdfIn PDF document text
    • https://pavimenti.pl/web/uploads/files/nuwutelujupokofowivemew.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/suwofasesedi.pdfIn PDF document text
    • https://local-atlas.ru/userfiles/files/misolijizodusemekaza.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/7718573736.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=200+usd+to+cadPDF link annotation
    • 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_off0000dacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DD 17712 bytes
SHA-256: 814f9bf03a86d63fc1f697e3054e5e922f08fa21c2cf20acf9da7a75f0d9e5ee
font_02_sfnt_off00012161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12161 10132 bytes
SHA-256: 438dd29a027f7897c58028622605329632aee867b89720ddad38434c88f1095e

Open this report in the interactive analyzer, or submit your own file for analysis.