Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b926ec3e2f13a63…

MALICIOUS

PDF

69.5 KB Created: 2021-09-16 04:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7eeeffd453ca4f4bf78663dd11853814 SHA-1: e568a516302c86d862955ce4cec1575e6174c725 SHA-256: 0b926ec3e2f13a6302406795df08448b1fd0b41e7411bf7f1d7a77dd5c0fc2e5
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. The PDF_IMAGE_LURE heuristic indicates it presents as an image to trick users into clicking embedded links. Multiple heuristics point to the document being a link farm hosted on potentially compromised or disposable domains, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the presence of numerous external URIs indicates a strong likelihood of redirection to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://catamma.ru/uplcv?utm_term=call+private+number+android PDF link annotation
    • http://turnwealthy.com/ckfinder/userfiles/files/xaxomanosonuverew.pdfIn PDF document text
    • http://yjeverspeed.com/userfiles/file/72015916000.pdfIn PDF document text
    • https://listapp.in/ci/userfiles/files/91454306774.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/romiwegifikibuzegutesaku.pdfIn PDF document text
    • http://noithatnhapkhaugiasi.com/luutru/files/81597949594.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/55332118519.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613be3b7f0b7e---kazodukake.pdfIn PDF document text
    • https://etevent.itweald.com/uploads/files/613e5b1a2346e.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/togawaresigewona.pdfIn PDF document text
    • https://gazeta-msp.pl/user_files/File/67608267129.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/3p9ta0kel36v0uhkpi5f17qno5/85761341059.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/rugebupuvoma.pdfIn PDF document text
    • http://brava-ekb.ru/userfiles/file/96911783377.pdfIn PDF document text
    • http://askort.pl/Upload/file/bejumakefisu.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/bd22c148dae10fd7d49fc23ae5da0b07/rovodalava.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/jajimebilasewad.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea57b47b6e---ziposubelesuxedegamevegoj.pdfIn PDF document text
    • http://aerotechgroup.ru/img/outer/files/dokogifefidadoti.pdfIn PDF document text
    • http://manuale.aziendasulweb.it/userfiles/files/62869404318.pdfIn PDF document text
    • https://justforjetscatering.com/userfiles/image/files/40303963884.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/74798523485.pdfIn PDF document text
    • http://gzky.cn/dubeite/ckfinder/userfiles/files/20210902_115356.pdfIn PDF document text
    • http://eco-building.cz/UserFiles/File/40433952324.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7819992bc---batetim.pdfIn PDF document text
    • http://tubesealer.com/uploaded/file/170946948561330356caad2.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_off0000b47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB47F 10720 bytes
SHA-256: b73357ebd665236c488bf46e8aeeb2ea6ea4e07eeacb91809a6d26ee12764674
font_01_sfnt_off0000ccdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDB 14156 bytes
SHA-256: 458f1a42e84b2ca5e4788eb0264b18ee2c5cb7e104089296c72f1b00fab4d021
font_02_sfnt_off0000efec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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