Malicious PDF — malware analysis report

Static analysis result for SHA-256 74a551956789f396…

MALICIOUS

PDF

85.2 KB Created: 2021-06-27 22:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 927124f7ba7ee4302707f68cddf40a2d SHA-1: 4fae16bed025d46d787971ec74d87b52a805ec8f SHA-256: 74a551956789f3961f246831696a2602708da38b357647c243426d0f860e32dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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://crysiq.ru/uplcv?utm_term=roswell+space+center PDF link annotation
    • http://al-bandak.com/userfiles/file/51996498019.pdfIn PDF document text
    • https://tennis94.fr/img/pics/files/segugobu.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160839440c9010---juvavujumobi.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/11020c60edfb2ac50ed57682d8882dfc/senapomugizepel.pdfIn PDF document text
    • http://servmed.net/userfiles/file/nebotexuwijigemukakinan.pdfIn PDF document text
    • http://studiovalecchi.it/userfiles/files/notoboxubozegujamozux.pdfIn PDF document text
    • https://susta.vn/userfiles/file/tibalokawuwawun.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5a8249dfc---zuxujo.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607300d8024ad---67127196003.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/49486059132.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfa0062484---kiwiruraxudezixog.pdfIn PDF document text
    • http://hrjok.com/uploadfile/file/vituragaxabomazux.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/5lv0qht75vrn9n9busn46o1kdm/33692822126.pdfIn PDF document text
    • http://usmleworkout.com/files/file/41843469420.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/92736122635.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/g5t0jbs7s60rd8hmao56a7aaf6/63521528136.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca57f80e38---59507535015.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/89845930025.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/e16gdvogbucbu899t9bq5g21o9/finunis.pdfIn PDF document text
    • http://twothirdsmajority.us/clients/38522/File/43569501028.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d12ee15c9a---noxiragarigijefedonatari.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/biveladetulolevegevove.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/ph1kepogbvror0o2o4f92fqlr0/59007278615.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/320e022e46e9bd1b71a1aed603ef9a54/97988486033.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_off0000ea7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7D 10408 bytes
SHA-256: b77dc57d9f75850a4c7873de2c48b2e8b1064b013688be42f91c7aa47f4dcbce
font_01_sfnt_off00010255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10255 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A67 17432 bytes
SHA-256: 352e089c8c22b6160ee7b41872f1f0ddd6e0bae076774e8b16d7f14491994794

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