Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a2dda7cd807021…

MALICIOUS

PDF

93.0 KB Created: 2021-06-28 00:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 41690e9976d3571f37a061fa41116be6 SHA-1: ed07a242eee0473a2d5af1a378aae3f51d696119 SHA-256: 92a2dda7cd8070214a19595a923d611110dfbbc6266ce6bb7f58a15cf8502184
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the PDF and its embedded URLs align with common phishing and malware delivery techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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.
  • 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://irlanc.ru/uplcv?utm_term=transitive+and+intransitive+definition
    • http://soft-pro.hr/upload/datoteke/61478521437.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/f97442be5c967a30d4bc893065a9047d/26555296215.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/hrse33i05q75eu4kbj38rpa0db/jixavunosesedixakuminob.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074883610722---37302443973.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608248ded1845---rebejimapupojatakubo.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbe86bd452---84687879929.pdf
    • https://bbpartner.cz/userfiles/file/84770600106.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/5e79f25e4735e66be84d4da188f0d6cb/modugajonifumuritata.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/sfhn1nt776krpdmfirdmnotv3u/mefovarijotigaxosokixe.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2f449a65f---31797878856.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093aa7fd1795---xuramov.pdf
    • http://zimaletto.com/uploads/file/jadimubi.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba64a420154---74686040737.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b582740798b---90324074006.pdf
    • http://diamond6ranch.com/userfiles/file/forawo.pdf
    • https://imagebeaute.fr/userfiles/file/4247114935.pdf
    • https://angkaganjil.com/contents//files/mivuxise.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/88e4c4fcca30e14514df951c1d6af2d8/19230901569.pdf
    • https://permargi.com/files/galeria/files/fezuvevarodus.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1a7.bin
b7e400e2e367ce9344fe8184457b6432968f1f1ec99c4dd85bd03c97cd8b8701
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A7 18924 bytes
font_01_sfnt_off00011182.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11182 16792 bytes
font_02_sfnt_off00012999.bin
dbaf261e2ace2206a29cc0c7f94fad83eb5410068d731033ed6b1bb345dec489
pdf-font-stream PDF embedded font (sfnt) at offset 0x12999 10332 bytes
font_03_sfnt_off00014110.bin
85f174e52408cb47f0ac61c0866499d65a35a6f6cb4ec6272eee8f5814a8e359
pdf-font-stream PDF embedded font (sfnt) at offset 0x14110 3576 bytes
font_04_sfnt_off00014f5a.bin
fdc3f250e16d4eeaac0151c08e1678493ac6cc67090af3137bc700c4cd553891
pdf-font-stream PDF embedded font (sfnt) at offset 0x14F5A 16348 bytes