Malicious PDF — malware analysis report

Static analysis result for SHA-256 94212fd09244433a…

MALICIOUS

PDF

88.8 KB Created: 2021-07-06 06:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 3635a1f5e09d21589ba7bfc7ae52b15c SHA-1: 196c29cc6d4e97df18cdf11c611a1833adeb294a SHA-256: 94212fd09244433a2392ee540b452f0c2f713cadee378d42f2d59932289453c6
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to obscure the ultimate destination and evade detection. The primary purpose appears to be redirecting users to malicious content through these compromised upload paths.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3229b23f47---jululelanataperode.pdf In PDF document text
    • http://altaprecision.com/userfiles/file/pujemelatosiretisuxitokon.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/52888801642.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b2358e05810---towupoxoxojog.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a67b70fe8---laxepixiwiroletelo.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/e80d122d8e79f752c364f25035f88149/85189057546.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/stb7qqqq3rrqebiigm81g26bju/vopekixez.pdfIn PDF document text
    • https://airshow-bg.com/file/zajojabajavuv.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/bixalezojozipubumo.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/5d8d49f471fcedcaaeef5b99ae1f148f/nafubavemiliz.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3cdcf53636---fisumapesotukutigin.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de2e051d740---goxikumevanu.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084cc2ea81f3---4725335312.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c4639b3fa---difub.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/45679396077.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/9e599314daa09931ae5382d16a032325/19441863247.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/283e5e871cf213385dd8c7dd51916c18/85168479598.pdfIn PDF document text
    • https://lesura.net/userfiles/file/paginedilaxamorudul.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/jakosote.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce7be81010---kidaleredimorubi.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/9d887ba8fc2ab130b4f25e24fba58945/83263056718.pdfIn PDF document text
    • http://misspacificus.com/clients/873634/File/zomilu.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160840bf342e45---84558857330.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608219dad1ebd---jizofozimuvokesiwuzexafif.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/56927009324.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+do+you+make+iron+on+minecraftPDF 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_off0000f8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AC 10808 bytes
SHA-256: 376cb771e3bede0782cad122d23c08802bed093b88e7143ad3a4fa5bfb31aca0
font_01_sfnt_off0001119b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1119B 17028 bytes
SHA-256: ecb8986b8dc33384e99b0ed4fa8bf5d7107b8ebc5d2a03744c9f788b0788010d
font_02_sfnt_off00013dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1