Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab9622ab0a3508e…

MALICIOUS

PDF

68.6 KB Created: 2021-09-04 20:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 17889f878c005735b211ea72834e8bac SHA-1: b7949abc7e3047c63cb9dcbe06de672d8a81704e SHA-256: dab9622ab0a3508e85ab7449a0f95ca34d4e2cc0ad048abf437eb6e55cde9365
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous links to external PDFs hosted on compromised CMS uploads and disposable domains, suggesting an attempt to redirect users to malicious content. The document's structure as an image-only PDF with a click-out action further supports its use as a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 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.
  • 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://ajambary.com/userfiles/file/40236839961.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/da995dd26aba2d7c563d5cb936dfd17a/pojejabaweb.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d47eb9c0e04---88216627651.pdf
    • https://accuratesearch.com/userfiles/file/564003744.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719a7f598a5---26550409694.pdf
    • http://papinchess.ru/userfiles/file/rafuvukefijaxesi.pdf
    • http://zhymwz.com/upfile/file/jamixox.pdf
    • http://zdravi-kromeriz.cz/files/file/lonekedoforanigop.pdf
    • http://goldmustang.ru/files/files/17084851539.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad16d88216---zevozuxefip.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/27738815949.pdf
    • http://cuatro-pr.org/sites/default/files/file/6745438086.pdf
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/zararapusopozog.pdf
    • http://thegioidahoacuong.com/uploads/image/files/zukaminul.pdf
    • http://urgentcarepb.net/userfiles/file/fubaxupelexujijogi.pdf
    • http://sva-jeanroze.com/xmedia/file/51220941267.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16077909fbad71---76213354995.pdf
    • https://mattress-leader.com/media/84537132758.pdf
    • http://acsalma.hu/userfiles/files/wupifu.pdf
    • http://studiolorenzoni.eu/userfiles/files/44661601772.pdf
    • http://alexlunacoach.com/img/editor/file/88757659687.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b82025750---zotenupi.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff7b241c10---4716615088.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=kinobody+aggressive+fat+loss+pdf+free+download
    • 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_off0000b0b5.bin
cf0db73e38b189da58d0aba6c351ad1bfd53f945d389813112506a3b5d26021c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B5 14040 bytes
font_01_sfnt_off0000d321.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD321 16792 bytes
font_02_sfnt_off0000eb38.bin
9615e79fdda9f2ddbfd4cbbba6b9c6e90030dee75464e47ffbbe0608b035b981
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB38 11072 bytes