Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c07eae3908657f6…

MALICIOUS

PDF

80.7 KB Created: 2021-09-20 02:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: aea809d033e2befc16a0adddcee98162 SHA-1: 016cf85f7890051da1244fc192e41661c98e3817 SHA-256: 6c07eae3908657f6d1d0bfde2ec38dc10e75539f5ab1db08b6a0c98a98e88154
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, a common tactic for phishing or distributing further malware. The `utm_term` parameter in one URL suggests a lure related to popular search terms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://garglob.ru/uplcv?utm_term=world+of+cricket+world+cup+2019+mod+apk PDF link annotation
    • http://xn--d1achljw0b.xn--p1ai/content/upload/90374306695.pdfIn PDF document text
    • http://caerulumpharma.com/upload/files/jikutimitiwiru.pdfIn PDF document text
    • http://otczenacts.com/media/files/mafinevatulasekifedo.pdfIn PDF document text
    • http://brickform.cz/obrazky/files/22525605367.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/77599242636.pdfIn PDF document text
    • http://ntvietnga.com/upload/files/55838678758.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/89948857437.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/s552q0ehanl707r6mr6s1r4589/50993256648.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/riputolonosubabi.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/tobusalato.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/puzaja.pdfIn PDF document text
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/berepejilazagujegezib.pdfIn PDF document text
    • https://everestart.com/images/stories/file/6058975833.pdfIn PDF document text
    • https://kingbakerypans.com/userfiles/file/84642578230.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/xajovujejapavudoxopire.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/57712275875.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/noselipatewolegenixexaba.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/61006692347.pdfIn PDF document text
    • https://netiko.fr/img/Data/file/45509915363.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/wazifofomemenuka.pdfIn PDF document text
    • http://thanhnienxp.com/vietkiendo/upload/file/98693750410.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/1ae0c4de90395e80adca954ef062be83/nubulufidosilagaj.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/sekofolidat.pdfIn PDF document text
    • http://kimkhimientrung.com/uploads/image/files/23070613712.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_off0000d428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD428 17904 bytes
SHA-256: f522e2d00e2e7809f0a7531195b6f6ae3dec5dabbbddfa9cfcaa2e202f8e4a7b
font_01_sfnt_off0001029c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029C 11244 bytes
SHA-256: 389d3bbf727ba597ddb5d9c29dd58851f09aa9231078306bda8fa5cf98066fed
font_02_sfnt_off00011d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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