Malicious PDF — malware analysis report

Static analysis result for SHA-256 01096038eaaa2ca5…

MALICIOUS

PDF

276.2 KB Created: 2021-08-08 22:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 2a40ac7ffc98dabba0f40724b14de49b SHA-1: a9af9b6383ba1444a1f7141c2c658bd702105c0b SHA-256: 01096038eaaa2ca58fcd0df635baaf7aa143bbc9a75d2d5ba02725767ec1c640
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The presence of numerous embedded URLs, many pointing to compromised WordPress sites, strongly suggests a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9048

Heuristics 5

  • 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.
  • 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://laborke.ru/uplcv?utm_term=blue+belly+lizard+care+sheet+petco PDF link annotation
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/94e9f327334f1476edc17716c7c4b711/basowotukokalab.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/xipelatekaduvuw.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/nilunazozemezew.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c236264a04---xovoxugozitirezujeforaduj.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///64546695687.pdfIn PDF document text
    • http://gruaszarate.com/ckfinder/userfiles/files/fejiz.pdfIn PDF document text
    • http://visusmarble.com/images_upload/files/wugozipaxadewegivute.pdfIn PDF document text
    • http://chikatere.com/Upload/files/jozovebutek.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/sunepexavajoriza.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/xisigewefiwekonawed.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/butenirazo.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160977f31aed2f---kodulegetap.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/kejj5f7q0bcf9fdt3s382t0mg6/pejizuvopugu.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/latofazowowefujibuvavi.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706e1043381---11226359321.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16086d37460e8f---buselomaretuposako.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/87538717205.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/ab67bfc536756cdf3aff11c3d2635bcf/5649132174.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7a7107554---povixidirafetajotunimutu.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/tevebinujuwifinuzaf.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/65881435048.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/vegilojunakodosixekanes.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160965a607990d---64650156423.pdfIn PDF document text
    • 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_off0003de3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3DE3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0003f655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F655 10972 bytes
SHA-256: e34445045e79b7923658d70263462a9e0107e01e0530e6dfaa9490b82c5db2ca
font_02_sfnt_off00040fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40FCC 18616 bytes
SHA-256: 42421d4ed8cde59178acdcf42f43e79440a24ac978410f2ee65eca454db8036f