Malicious PDF — malware analysis report

Static analysis result for SHA-256 14da6d32d9081649…

MALICIOUS

PDF

70.0 KB Created: 2021-09-05 15:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c2bcf03b9be81ea94ef5c6aafbd71881 SHA-1: c388c5f8f4b65bbc981b74b1dc99cabbb3a48c4b SHA-256: 14da6d32d90816496c5bdf2cb39b070081201efd267ff17c950700f7ffd486e8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by multiple heuristics and ClamAV, indicating it's likely a phishing lure. The PDF contains a link farm pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the PDF structure and URL patterns are consistent with spearphishing campaigns.

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://vibanghanoi.com/uploads/files/semerekixunigefasiro.pdf
    • http://whatdwellswithin.com/file/44634804919.pdf
    • http://dsm-trhs68.com/clients/8/81/818e764d3414495a915a5f66638dc9bf/File/89915156267.pdf
    • http://csaladiegyteruautok.hu/userfiles/files/mizirotasasekesit.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/73d90b081338ddef841129af513f79ce/51618901955.pdf
    • http://ecogestval.com/userfiles/file/3717731068.pdf
    • https://szabobuszberles.hu/files/files/xirifupod.pdf
    • http://elhammagazine.com/ckfinder/userfiles/files/23019702628.pdf
    • https://sportnazona.bg/f/uploads/files/26908934515.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f3334732279---pebaguluwunerin.pdf
    • http://hyperasp.net/userfiles/file/vamor.pdf
    • http://texmet.pl/userimages/file/6411063682.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc193a6d8b---12344759479.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608995c5c31fb---8479246867.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c972466a718---90368644027.pdf
    • https://www.frontieregypt.com/sites/all/libraries/ckfinder/userfiles/files/xemasekezilogomobi.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b31084419b---47553503636.pdf
    • https://latework.cz/soubory/nototuzobuxulos.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1610292330a2e3---28939165437.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/648223b391a09002d5487fe5af6dd797/26211426783.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c160d0760d6---5317971336.pdf
    • http://iworking.vn/uploads/files/wewugenobola.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/vst1aqb54fadgfcogcb4afbmua/pudetesi.pdf
    • http://hoangduy.vn/vn/files/vanuzana.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=common+weeds+of+rice+in+the+philippines+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5d1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB5D1 16792 bytes
font_01_sfnt_off0000cde3.bin
e7a56610859b65c3f1441ceff137712f8a75f05cec3e8e82f949a3968f1b41a2
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE3 14260 bytes
font_02_sfnt_off0000f0f5.bin
3f707ec75ddab5e8dfc9280cdb290185f9970eeed37efd51443576166c21480d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F5 10840 bytes