Malicious PDF — malware analysis report

Static analysis result for SHA-256 750192cdb98d8032…

MALICIOUS

PDF

193.1 KB Created: 2021-06-25 12:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f7ebd2aaea92fe08f2825d052c7344a SHA-1: 2595754c4faea38d0dfa76aef34396b758bd5cc9 SHA-256: 750192cdb98d803286e0bba17e8f015089460f7f44d82c207b2426c9446d53a8
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure as a link farm suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805ed08c4b8---jekofod.pdf
    • http://tgtech-auto.com/userfiles/file/bexoxarixojakelesezepi.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/8kid4goteuhullhim3r91lf0k3/medatu.pdf
    • http://simonide.org/userfiles/file/desomilotibarekenekisi.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/93218613256.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/5tk61nb3vm78cstatuta3u4ian/redinanojuvuligenadufezi.pdf
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/e31f4fa146fc6a08308e22bc478a239c/memade.pdf
    • http://georgekoldun.com/var/upload/file/zajawa.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a6837952a---vijedotixebiwema.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e12bacee0a---kuwetebamokidekuke.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/cc8a3596f40bcceaedc89ec08449078f/49625880226.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c3883144132---rimugimanirovipizoj.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16092a83375d23---xoripirelezojevepi.pdf
    • http://goldartline.ua/userfiles/file/pabevekawikejopug.pdf
    • http://slp70.com/clients/873855/File/39419571178.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=in+the+ninth+hour+meaning
    • 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_off00027216.bin
c8a4a749b7ebf3c2aab952f38abc1f132a90f6930e32d59b96a6fe1e5c764f3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27216 10392 bytes
font_01_sfnt_off0002895e.bin
af293b2b60dc5e826b00d8953dd18f37a59bdd939ad7d7593537948814e7f124		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2895E 16232 bytes
font_02_sfnt_off00029f1b.bin
197dd419899eac41d2052575c8195f55d72d2f967a7880631858e521c783f144		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29F1B 27616 bytes
font_03_sfnt_off0002dd56.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD56 16792 bytes

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