Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba6b48587335881…

MALICIOUS

PDF

95.3 KB Created: 2021-07-01 21:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 81efafee67e9815eb5d439942d93bea7 SHA-1: 022881cd87fd548c2ea3dc85cc75b92be81e08e8 SHA-256: 5ba6b48587335881ce54902cdacfd9dc4391eb010042ee6e00f07325184c9267
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely intended to lure users to phishing or malware distribution sites. The presence of multiple links on potentially compromised infrastructure suggests an attempt to obscure the true destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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 https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/4a6ee9f8381160d6d59e00934dab6f46/84866003292.pdf
    • http://mynigaoe.com/upload/file/20210511190915.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/e023bfa3bf17d4e1b118d5261d52d4f1/77748830138.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbc28dd7745---47122499597.pdf
    • http://mai-colle.jp/userfiles/file/18242588616.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2fc0db641---jumefobipos.pdf
    • http://adabaskimerkezi.com/upload/file/48157677109.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/l8bfrj4njo07qn0h49aiquei1q/52947079978.pdf
    • https://escaletravel.com/userfiles/files/pawegozipobamumuka.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e68030012f---zodajulezifujused.pdf
    • http://targdenunti.ro/userfiles/file/viforilidanud.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f874f4c597---76883228164.pdf
    • http://skiflogistics.ru/userfiles/file/kutez.pdf
    • http://danburyhighclassof1961.com/clients/b/b4/b42d7d7907ff1a67dd6fd366dd3c6775/File/bapajeko.pdf
    • http://archi1919.com/smlclub-files/file/39468625983.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bde3d0bd4f8---mikobajakifigometob.pdf
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/q724q53taeeqgq5cjcc73gcfq9/97006468898.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/164613ace327fc2d050a24553f239ebf/41349450496.pdf
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/urdmb2htf28v79ovlgrv60upm4/89968074293.pdf
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a295c092c---17594311678.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160891664159a6---mawap.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/cioi1ha4prfiirect5e7377g59/putigebo.pdf
    • http://sosonomo.com/ckfinder/userfiles/files/81789425655.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+get+fortnite+on+a+macbook+pro
    • 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_off0000fbfc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFC 16792 bytes
font_01_sfnt_off0001140e.bin
cf0ce7cfef0006c3f7860528d0a61788dc7e2d39d12469597b570f9a2248c561		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1140E 16936 bytes
font_02_sfnt_off00014034.bin
0c133022d1e9883d2ff7035cf84f1fa0be9cfa0d671266bc5a940283bc0f9855		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14034 16376 bytes
font_03_sfnt_off0001565d.bin
5f157c6ea89dfa0a8c60696142b571c6cf39446a9e14066abc8ef36f2ce182dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1565D 10920 bytes

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