Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d67ff8e1465a8c…

MALICIOUS

PDF

68.6 KB Created: 2021-09-16 08:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: bd192601d1322a7f8763d2c25b867b8a SHA-1: f0e7a1766dbf8957982305c28b1a4678df56ff19 SHA-256: f2d67ff8e1465a8cbbb946325b2d66b69abcaafb056caeaae181ae7b0d05848a
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical for phishing campaigns, with a high ML classifier score and ClamAV detection. It contains multiple embedded URLs, one of which is a redirector with a search term, suggesting an attempt to lure users to malicious content. No scripts were extracted, but the structure and URL usage strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://queure.ru/uplcv?utm_term=duplex+iptv+cracked+smart+tv PDF link annotation
    • https://nieruchomosciprzetargi.pl/files/file/10124381236.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8e9c678ba---98317586870.pdfIn PDF document text
    • http://medicalproduct.hu/images/files/votafoworameruligaxibozap.pdfIn PDF document text
    • http://indianmailbox.com/assets/images/userfiles/files/81620476146.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/munokope.pdfIn PDF document text
    • http://yuanda-boiler.com/d/files/nejodabajunovituseziva.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/zetitigix.pdfIn PDF document text
    • http://forumts.com/ckfinder/userfiles/files/sigurugiwogubebasasawutew.pdfIn PDF document text
    • https://seedcambodia.org/htdocs/cljr/data/files/muxizamuzo.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/gilibasir.pdfIn PDF document text
    • http://greensquares.in/userfiles/file///87071459286.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161404380c8f3d---futum.pdfIn PDF document text
    • http://streetnn.ru/data/upload/ck/files/bomifojibujunabaxika.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/85281098583.pdfIn PDF document text
    • http://rigassprotes.lv/uploadz/file/pogotukebivi.pdfIn PDF document text
    • https://aildf.in/userfiles/file/24913705531.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/33873923260.pdfIn PDF document text
    • http://clinicaveterinariasangiacomo.it/userfiles/files/wunikatarazezalogisudus.pdfIn PDF document text
    • http://gaytonfa.com/upload/files/18536533111.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/59389924288.pdfIn PDF document text
    • http://knx-shop.ru/admin/ckfinder/userfiles/files/wezofurexaw.pdfIn PDF document text
    • http://gzcil.com/uploadfile/files/3655176091.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_off0000aea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B8 14272 bytes
SHA-256: f610dddb963bb7a7a80e341d2711fed4dfe92d857d8047ce220b217918e8677f
font_02_sfnt_off0000ea29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA29 10812 bytes
SHA-256: 7b351faeb62c1c78699a047fd1da22fff65218b17d1716d03458d68f6c1b874d

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