Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a47db9e5dd0105…

MALICIOUS

PDF

87.0 KB Created: 2021-06-29 19:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 662d898abe0036d2224b0925bce6380d SHA-1: e24aa099e425fe35d25c447118059551bb96386c SHA-256: 57a47db9e5dd01057f9d09701214a9d23539f54bc725531e9fd8f81665fc8150
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier also returned a high confidence score for maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f8884831a---ridudeje.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/dii1u0p6dq47pdp98gpl5jh8l2/kataf.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ed4099045---30610031402.pdf
    • http://jrpst.pl/userfiles/file/rezulotolu.pdf
    • http://alfonsoguiggiarchitetto.it/userfiles/files/muwisoxiropegafopiman.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/i2mi7f0e8f9feimuv82otsbtvg/88693484222.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/r8bhp48f41f5vc2in8l191vcbh/jijusun.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073aa409826f---raropawewudemarapu.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/gomomabod.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160808c593e12c---niwibina.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/h0vgrkd84i8k602pvurt1sfke4/wadawakizero.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713fa0d8976---texiwalejizedijadewuw.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/cf293207206bc5b998620180f052c9c4/zokitalobugubuz.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/16aa9f8ba8cf2d2adccf6e0366fc0def/kevajaz.pdf
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/7085d9854fdfc59b9bb3efe69be03953/52945499053.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/53c880eab97da47ecccffce7a341c6c5/18842246391.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/f3e3ba56775110d7f74a7a77af09fe01/dojozitoxadirejedobigeja.pdf
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/3eb60e41d2c711812b6d8a03accbda69/2633367183.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160870fe652655---13110918195.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a13f66efac9---60364936505.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/e62cmrackm064of2mj7urqqddq/17270629272.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf930d2cc09---taxikunujiwuforu.pdf
    • http://www.siscbolivia.com/admin/uploaded/fck/file/xotudixug.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=bump+on+eyelid+for+months
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E6 16792 bytes
font_01_sfnt_off00010afd.bin
e400e9d77dd5b3f0ebd67913c0869842a899046b7517f29cd7d43d5df07f5d02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFD 10868 bytes
font_02_sfnt_off000123e1.bin
25351c1a36b91a0d76ca6f0b81868247026cbdba2b0dd3dadd4f7a60654dd386		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123E1 16568 bytes

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