Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd7ad069654051f…

MALICIOUS

PDF

71.3 KB Created: 2021-09-07 08:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 70c03145711fde4ed91c748989183b0b SHA-1: 9b38c51dd6eef71669002a20546faae92e21d55e SHA-256: ebd7ad069654051f8e4e601aa81e96c688cf91a0e4a54112839aedbb08f98ad1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised websites, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of these links and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16119a8962ee5a---75882255017.pdf In PDF document text
    • http://senn60reunion.com/clients/876260/File/wuvevudisuvile.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/3a60eb57c936e01bead0a53e0fe7c823/divebirurob.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/luzixulaz.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/22214329506.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16075866a0cc90---59862959115.pdfIn PDF document text
    • http://qianxish.com/ckfind_image/files/63550245887.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/xubetesepajakogut.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/zelotubabolulufogixer.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/15741776800.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/13118390900.pdfIn PDF document text
    • http://chikatere.com/Upload/files/sinit.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/demadefolanupunaxepuvona.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/fakizirukugivulediveraj.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/83772100891.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/xebikudovigizivomudefe.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffed5c0dea---resezidazelatob.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/6042265356.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/d5be169b351453625f9241fbabcba6ff/55824433224.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/zutuse.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/49552561491.pdfIn PDF document text
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/95640374640.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///91310903303.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=2017+fiat+124+spider+owners+manual+pdfPDF 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_off0000b4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC4 11172 bytes
SHA-256: aab34e917c8255512a477b052f820e8d6aabf28ff4763c9aef2979bb47dca0ef
font_02_sfnt_off0000e712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE712 15792 bytes
SHA-256: 66ef33246ad67c27813b0191446d5cb381365497dbe1d18bb97208a49827d013

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