Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2a143010545e3f…

MALICIOUS

PDF

81.7 KB Created: 2021-09-02 09:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3bdaecfa9e5cd92e815b08d80ede5859 SHA-1: fc730b496a6e0333c0052afd1824a25f4a7415bd SHA-256: 9a2a143010545e3fadc2afd3f6dbd02d76cb94e1737d5dcf352e4017fe35d92f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a callback phishing or tech-support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting an attempt to distribute malicious content or redirect users. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the overall structure and heuristics point to a social engineering attack aimed at tricking the user into initiating contact.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=bsc+honours+agriculture PDF link annotation
    • http://dsm-trhs68.com/clients/8/81/818e764d3414495a915a5f66638dc9bf/File/32545505919.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/c225ee65ffee0ab2621a5e1ad4da56c4/18662589865.pdfIn PDF document text
    • http://tiszaladany.hu/upload/file/bonozowebijikaseziweta.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-7-16/20210716021608492931.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/0a7bd7e89cf675dd926b8789bbae221f/wenemikaze.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/94436609724.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/66944881481.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/59302679268.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/54154536997.pdfIn PDF document text
    • http://donaldbermanmaimonidesgolf2021.com/clients/0/0d/0d43fbb8ff91cab41fa1b056c0d912a9/File/roxetogarezidajafi.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c3a2d974c---xaxukavafinadoredemomeg.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/ndrqccc3ufsehntqehha4a5qvb/94452481392.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e075d88c0e---depojisumefusifojuminake.pdfIn PDF document text
    • https://www.aledrukujemy.pl/ckfinder/userfiles/files/petemibiledarudazafeweji.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media//70488864395.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/81673235122.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/favasodetivumigov.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/e03d5e75e772155ffe6caa485f9a6bf1/nobazozi.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/ucljgqhg5a310a4mgdjbc5i21q/fuwiwabujonipavexu.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607db91ce5015---bukokul.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/4146012d62445c2d093048ad3e7ad6ab/13821015326.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/m76ppn8l37b67i5p3a0upc9knk/zalom.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160fc0bd68bf81---kufidebed.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_off0000dc41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF453 17028 bytes
SHA-256: d74c086e9ccfa5fde68455fa9d9fead75f78410c72c4351887e62994fcd22d18
font_02_sfnt_off0001209d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1209D 10664 bytes
SHA-256: 203a69effb9cd1275f4a1c58e3d022b0b07e7a5de75b02458311af6b08bb6d19

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