Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3699891777c3339…

MALICIOUS

PDF

93.7 KB Created: 2021-09-03 20:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6c6a099b9072c66623fe62e76e0ab531 SHA-1: 48d6bc4292d907929b5369401bb124e63318f6b8 SHA-256: d3699891777c3339ed6ac5316b95a324d7331fc97ed05128823970a766c92ca8
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 pointing to potentially compromised websites, suggesting an attempt to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection further support its malicious nature, flagging it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • 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.
  • 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://laborke.ru/uplcv?utm_term=manual+reloj+citizen+eco+drive+e820 PDF link annotation
    • https://fotokeramika.bg/userfiles/file/logawidonomuwumoduwapowa.pdfIn PDF document text
    • https://hotnewsmd.deca.md/upload/userfiles/files/wewadajemodi.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/uv86vtr2buiukem79s1aa91a21/tajalokawapisixupuvaxo.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/79404996381.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/bezugudoliralafaxuxijo.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/81ea5ac1857d13b70c8a8ebd5f559d0c/21599967987.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/ralof.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/rrdiblkgqv0e9775pbtc5ntp9f/tidajopepimekabu.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/97124945170.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/94799225961.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/i5nleipk1a25ic2v05fm01uo6p/47811815872.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/vunilefara.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/845c7a21a6d388a0ad6b2c9c6cba9d03/28540093501.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/38678684155.pdfIn PDF document text
    • http://zeroseistudio.eu/userfiles/files/tuleguw.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/17276922974.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/ekdvagmqgvfu55gre3g43vtrve/46713674039.pdfIn PDF document text
    • http://atek-ent.com/upload/file/11797837025.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/27063369049.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8683c04c5---debugujo.pdfIn PDF document text
    • https://gameclub.by/uploads/files/merozozakukizuboji.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/nhbhigt2osgm1en2akik66nddf/18179601044.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5c48caf50---gelolusutixabefof.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f021651e9a8---39260934324.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_off0000fba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA2 10996 bytes
SHA-256: 4aa52ffc4aaf17298fd8506f6a45a2e5e88c5d62beba6a1eed825eb4f624fb9c
font_01_sfnt_off00011561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11561 22972 bytes
SHA-256: 4cec06033e8727e4aba5e64c3b69d9738d21da69cacc3098be1cccdfeb0975de
font_02_sfnt_off000150a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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