Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c351f844fe91272…

MALICIOUS

PDF

96.0 KB Created: 2021-07-07 23:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f3e49fd026db445f62dff4eb7a93828a SHA-1: 8f88feac79b22e60cec4390b2d6f4e19b2f5fce1 SHA-256: 2c351f844fe91272e446fc8dbdd9f5e5fd6f0ab30744fcf547ff389d5f6add55
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs are the primary indicators of compromise, likely leading to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9825

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://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/15ea11f38afef9a4ed4f29a1a425f481/gaxoperutufun.pdf
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/dc89f8024b1211d5c3d3f6490cb384a8/11635548748.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/1a06166bd93f72f9c8b2c484f365dc08/fekotil.pdf
    • http://funperm.ru/content/file/67581117309.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41a1076703---17532632542.pdf
    • https://kildevangen.dk/files/10241126813.pdf
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16097481263470---48068932338.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/cj3cn5u18l9i6240cejlk6j184/50702733916.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/7thu7iguvi79sae4r2jicnio14/vuzafap.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b639b0d088b---gizaniferigosadejov.pdf
    • http://busankid.com/webfiles/board/file///75420366587.pdf
    • http://wphs67.com/clients/9/95/95f8299e8098c1f2c85aab0f7ead5e97/File/58075826171.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16081e39542c5b---kerejag.pdf
    • https://dijitalsanat.link/upload/files/remidit.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b561376ce3e---rilanepibevanekofag.pdf
    • https://aronabritcan.com/userfiles/file/rimidila.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/81cc5acf01ef3352f53a59638af7c91d/41276200981.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df36735bd7---kirewof.pdf
    • https://xo-sound.ru/userfiles/file/rosivenawewasuviwu.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078abe8c95a8---budesivezijesebifokamimat.pdf
    • http://rurisnet.org/images/file/jigipupovalo.pdf
    • http://vladjurnalist.ru/archive/file/64767003393.pdf
    • https://thehideawayresortpattaya.com/userfiles/files/zidida.pdf
    • http://goref.ru/files/file/modapas.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=meaning+of+shala
    • 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
stream_005_off00011acb.bin
8dec157f722d202fb9d69f9e3b5b7d9dfd5ae75082fce9e14f0c2d975dcf2023		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11ACB 19488 bytes
font_00_sfnt_off0000de32.bin
a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE32 3464 bytes
font_01_sfnt_off0000ebb2.bin
bf4d2a2dd12986f2370a07c597ebf2de87ca00db0ddde43396f0fa8ed7188692		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB2 10288 bytes
font_02_sfnt_off000102ba.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102BA 16792 bytes
font_04_sfnt_off00013b07.bin
c54017bafcfe70cf51db77b54fa30c22413e67f0827be2676b2f66dae3d61568		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B07 22236 bytes

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