Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c7ee76d701f4ee…

MALICIOUS

PDF

83.7 KB Created: 2021-09-22 12:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d0696573a02aacfcb84d8d876af67bc5 SHA-1: b270f682c0386cab88b93f307dfeb906d725bee9 SHA-256: 95c7ee76d701f4ee71fd1aee8991045daceb648f107f93dee79c0e344ef7001c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the document is part of a link farm designed to host many PDFs on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were extracted, the presence of numerous unknown URLs suggests the document's primary purpose is to redirect users to these potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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
  • 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://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/fiseviza.pdf
    • https://balbok.net/admin/ckfinder/userfiles/files/pewuwoju.pdf
    • https://capital-publishing.com/ckfinder/userfiles/files/4335125040.pdf
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/29011762345.pdf
    • http://pierrevillers.fr/mairie_files/file/11628204770.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613402a245fcd---23406717849.pdf
    • https://indiachristian.org/uploads/files/pezale.pdf
    • http://chengzechem.com/upload/files/zovabuzi.pdf
    • http://cnsgawefgl.netsociality.com/upload/files/85489182896.pdf
    • https://poulinstrapscan.com/userfiles/file/71266282799.pdf
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/jijom.pdf
    • http://life-homeshop.com/asset/uploads/files/85742121417.pdf
    • http://maychaybocaocap.com/app/webroot/uploads/files/6106483630.pdf
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/8704946006.pdf
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/21658030038.pdf
    • http://www.majbrno.cz/uploads/files/94843279925.pdf
    • https://editionsitaliques.com/userfiles/file/zapejipijajomojizemufe.pdf
    • https://homestayhoian.thamtuddt.com/uploads/image/files/xuguwaru.pdf
    • https://lesartsdansmonjardin.com/userfiles/file/20210914114751.pdf
    • https://global-product.org/CKEdit/upload/files/13649215752.pdf
    • http://studiotecnicofrisoli.com/userfiles/files/muranukakom.pdf
    • https://rugsdirect4u.com/uploadedfiles/file/60608262798.pdf
    • https://giaphutelecom.com/tctt/sites/aaa/file/livemomidujotuti.pdf
    • http://minerva-collection.net/files/files/6579807419.pdf
    • http://tmkb.org.tr/ckfinder/userfiles/files/veribexerapufadure.pdf
    • http://intelekt.biz/uploads/pages/files/raroxenafekujatavog.pdf
    • http://chinatriage.com/ckfinder/userfiles/files/wusaxosozolu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=get+context+from+fragment+kotlin
    • 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_off0000e287.bin
33e86457e7c88237407702a259afb285e2c30b6d8ecb74c5ca8ad47c0d8dac66		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE287 10744 bytes
font_01_sfnt_off0000fb41.bin
c0da983b9168af781d1d4d2c9a3fad3636b9b40bfbb3fc121f57086daac3f45c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB41 17572 bytes
font_02_sfnt_off0001295a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1295A 16792 bytes

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