Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e70f0737dc060de…

MALICIOUS

PDF

95.4 KB Created: 2021-08-07 20:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 16680f01bb0ee6ea59c5de153beff804 SHA-1: af917cf55ffd82b0bc1ba48c24e78b41fb30e596 SHA-256: 9e70f0737dc060de29b454ad2c42932866a20a21f418a62d7a27f9320fd3c62d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to potentially compromised CMS upload directories and disposable hosting. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it is designed to lure users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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 http://teknis.it/userfiles/files/xoromemubojixalimip.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160e3f030c674f---desazenoxoxap.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160791725daab8---xowagofon.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9e0902ac2---goxeparolipibos.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/2ef323bdf17d74994ccab84ca17b7f8a/dosabotosidi.pdf
    • http://transinfosoft.com/userfiles/file/fovawigipijidademu.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c1f998d30---lomegafaruzitan.pdf
    • https://ms02bet.com/contents//files/24627343314.pdf
    • http://ginzaoakland.com/uploads/files/30697623684.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/9a7be39988b0ee2743c3ffe48116a599/miwefukirelefe.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b496a1a6c09---90967573438.pdf
    • http://zuche0551.com/upload/file/67585447122.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608037065059f---lelase.pdf
    • https://swagath.co/new/ckfinder/userfiles/files/45518220148.pdf
    • http://yonseri.org/userfiles/files/65790148853.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608db25b2ac90---sofawagulake.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b1843a962---tesonunimedemet.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/452f1552c8be497f775bbd2b8f90e569/72631928683.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/82ed717c57f1716d2f191bd764e2c6b5/naranikagulizatikarula.pdf
    • http://cartonwrappingmachine.com/userfiles/file/85179229476.pdf
    • https://maviet.vn/upload/files/43971524383.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b2245fd4af8---lozuvu.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd69c5a533---sivipovezebixeperakudezod.pdf
    • http://retroldn.com/userfiles/file/4459354537.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=cuaderno+de+grafomotricidad+para+imprimir+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f58e.bin
7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
pdf-font-stream PDF embedded font (sfnt) at offset 0xF58E 16312 bytes
font_01_sfnt_off00010b9a.bin
d98ef329e6b3b5f8c1484e45574d0da2a6031396030f7180783ef0b82fa8112e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9A 10880 bytes
font_02_sfnt_off00012491.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12491 16792 bytes
font_03_sfnt_off00013ca3.bin
23307c8c7ad8fd826f841dc2ada29722e9c23b7c24dd23a61962ff23ea288581
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA3 19144 bytes