Malicious PDF — malware analysis report

Static analysis result for SHA-256 f38dba74632801fc…

MALICIOUS

PDF

107.1 KB Created: 2021-08-02 12:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0b26477b981841bcbada2d2772ea3ccd SHA-1: fc2baa731d2a02845b7d7826c0b366289870f342 SHA-256: f38dba74632801fcb06109359a531255e92fb5bfc8325bd7055d5e3c4aaa42f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://philabc.ru/uplcv?utm_term=lifepo4+battery+advantages+and+disadvantages PDF link annotation
    • http://argyleliquidations.com/userfiles/files/motedovezedoke.pdfIn PDF document text
    • http://1960vonsteuben.com/clients/d/df/dfb5e1b83ea85bfdc5ef1da934264264/File/6221877487.pdfIn PDF document text
    • http://jaatkinson.com/userimages/29121455555.pdfIn PDF document text
    • http://kalikraft.com/images/file/5413067743.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/04a12ffc6956e603093f5302c591c49d/xovebujamo.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/a38546d78676d63affbb9e352ae691d9/16011685923.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/vemirakogukitetajuzuke.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/vosakom.pdfIn PDF document text
    • https://cvzona.lt/resources/img/files/30828431121.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/3ef0b20a8054db6d1704caa4ccae5621/sufumokonod.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2004f1c272---tuxamatud.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/trda7u7jpipijpsbav82bggo1i/dumenasasizevewi.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/19923206518.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b67443bd49---terufutitiwawegefaxel.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb596b1a2b---34441023994.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b22c5f1072a---sonukob.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/rezewipozejasekosan.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/92590568209.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160974d6801972---50072981750.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/36140949140.pdfIn PDF document text
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/bisekixemowugajewax.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/lidomovup.pdfIn PDF document text
    • http://ekotronic.eu/files/file/fifutimi.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/soup7ac7t1rehnai97vqd3j2b2/xananalometedad.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001255a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255A 10980 bytes
SHA-256: a0f3f080ac6324b9d694768734df63c47f8c81ffb8d365b4541ee65d5581155b
font_01_sfnt_off00013e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9A 16132 bytes
SHA-256: eb83fb48a2f60ac59fad768156047f025764cad4052c8f34695a9c8dd2456ad8
font_02_sfnt_off00015407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15407 18596 bytes
SHA-256: d4ffacaf5a680a21f501fce292f051ead14726e3963ae2a39ff19a7bfbacb280
font_03_sfnt_off0001853d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1853D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.