Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cbb60c8fe8dc9c4…

MALICIOUS

PDF

108.0 KB Created: 2021-07-04 03:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cea28f9d594ed6267245324493d6e20b SHA-1: 2465dbfd36124c94bf81a19fc71999ef70ad01d6 SHA-256: 9cbb60c8fe8dc9c45fd2d3605ea80ea01ab5982deaec5c8f6b9f3b73fb1ab168
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous compromised websites, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious content, likely via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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://yaqeen-eg.com/userfiles/file/xijofodotizasubogor.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d59f5436a1e---meroripomivorajap.pdf
    • http://hifimarkt.eu/kunden/kronhardt/ckfinder/userfiles/files/49296148495.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b1e31019d---40010575781.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/17dd5a40d5754f149489d5c00cb00e87/monomatabawoxomu.pdf
    • http://logo4you.dk/userfiles/file/2346859774.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/d00593d2845b9370fa6b1db61d68f7f3/46252755272.pdf
    • https://planet-for-events.de/userfiles/file/43333554139.pdf
    • http://jump360.co/upload/files/20210625113710.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e422f02b7---209028962.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/e87f239975227f7ec3a900c826531d00/29438597318.pdf
    • http://mxm-hosting.nl/img/editor/file/sedajipurovemokonefevex.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6f32bd449---dutabotufijo.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55dc10e7cb---12763337876.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c8522f58f---5187560239.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/piu81cem9s5etmkg5qr59rg2p7/74185438008.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/5abc6ad332b74bd1f1522ade6d6a4f7a/gipurifixar.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e22057483---62779360749.pdf
    • http://air-ned.com/uploads/files/tewetozuwezodofev.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/b225aosnsmu25005eqi7ar3kk2/vegofud.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/b6fa70169f0226e36c457f45d28d20fd/mowolirepalowagijipukawu.pdf
    • https://topclassgreenery.nl/images/file/faxidudoroleva.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfbd8acf4f---93971653287.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ad839b143---50120386602.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bb341623e---rebimawafisuta.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=the+morphology+of+human+blood+cells+7th+edition+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_off00012985.bin
e6355cda2389dd597a6062710b90fa1143ba506e2c1ef6897c29563772b84d6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12985 18336 bytes
font_01_sfnt_off00015a2d.bin
dbb23cbefcad9a9985f98552436eb3580845b94506b2177b1988c252f1f1df31
pdf-font-stream PDF embedded font (sfnt) at offset 0x15A2D 11432 bytes
font_02_sfnt_off0001749c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1749C 16792 bytes
font_03_sfnt_off00018cad.bin
8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825
pdf-font-stream PDF embedded font (sfnt) at offset 0x18CAD 16060 bytes