Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a7a06e9bb768969…

MALICIOUS

PDF

80.1 KB Created: 2021-09-17 21:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 37eb49e6be2288d1f07e22834d643bf1 SHA-1: cd2a2948df1b848fa92c8de62be2a02b50432bf6 SHA-256: 9a7a06e9bb76896918804e17c41844961d9b9d12546dde55cfb46d33bfd2d41a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that redirect to various hosting sites, many of which appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=jurassic+world+evolution+mobile+apk PDF link annotation
    • http://ccshecea.org/upload/files/18483707676.pdfIn PDF document text
    • https://dacola.com/upload/files/dagetotuniwokibalavosim.pdfIn PDF document text
    • https://kristaldicarlo.com/userfiles/file/8187379181.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138174341311---forabafitunodutedami.pdfIn PDF document text
    • http://addon-colsman.somantec.net/ckfinder/userfiles/files/42465136001.pdfIn PDF document text
    • http://storemisr.com/uploads/files/76444911225.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/bigajebotimoxikud.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/72536440263.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/85267068139.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/770605775613bad00d2916.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/51027734203.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/fonisowegut.pdfIn PDF document text
    • http://zonweringbelgie.com/ckfinder/userfiles/files/54666626537.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/93926418462.pdfIn PDF document text
    • http://azizolace.cz/images/file/dodafaradarigorix.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/fizilusufoxawogi.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/xisaken.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/mradfg5pc4qcfds52d4vq42q23/16935177547.pdfIn PDF document text
    • http://onyx-innovations.com/assets/ckfinder/userfiles/files/19767210658.pdfIn PDF document text
    • https://karpataljaturizmus.hu/upload/93304102751.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/xasawopepolifamujinob.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/kerepejajuzigixisuvepi.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/wiwosesewalaxunek.pdfIn PDF document text
    • http://ud2-140.com/files/52224033433.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_off0000cf83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF83 18744 bytes
SHA-256: a80dbc60d2e11fb03e7f38391100113b3fe966bc5cc3593c777f773ae2db64fc
font_01_sfnt_off00010096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10096 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118AD 11148 bytes
SHA-256: 270f171c94860c35fb94472047f2c0cefd5da61b5005a5493a266b4428788c42

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