Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d4e4fc5c6eb8b0…

MALICIOUS

PDF

87.7 KB Created: 2021-07-13 19:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3e1dd0ae7999c8e36202698dc8f75d98 SHA-1: 5889348d046a0719e91ab120c4922acfb2277972 SHA-256: 80d4e4fc5c6eb8b00ecc9c1ce9d71b5b0d2695ba35aeb94ec21d9365d75212ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve as a distribution mechanism for phishing or malware, leveraging the PDF as an initial lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://crewmak.ru/uplcv?utm_term=pragmatism+research+philosophy+definition PDF link annotation
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2553d00719---22834482565.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d7c2fe64d9b---suzinegasizu.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/33661693279.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/93686077822.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/a4c5378fd527278efb2509805555be8c/60359662250.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/voremol.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/58563990532.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/d9dd995e9eac34c69fb82b833a0a4ede/19462791462.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/aa3137969a619c569a92f005df00fc4e/38034979752.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c003e4ba5db---36527890886.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/3f53a11fd6c7fe43d08a9ed7dcc11945/rulaxagasasawekife.pdfIn PDF document text
    • http://candientushinko.com/images/file/94779442659.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/40067495915.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607182cea30b4---32069091113.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/bokafapobibodobifi.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/kapukegejaminu.pdfIn PDF document text
    • https://tootooair.com/FileData/ckfinder/files/20210614_E8B57C77EA1F6C94.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/e30632e4b40afc8399531f0d65dbe873/wafed.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609b761b8060e---73809497675.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c25550909---xuzegatajabanepukadit.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e08071710e9---95153589205.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/7814481810.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/78499647767.pdfIn PDF document text
    • https://vydavatelstvoklett.sk/userfiles/file/79554196155.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA4 11184 bytes
SHA-256: 28f19d0a7057b1289563e18f71c5b49fa95243d5a85b31cb8d551137df537668
font_02_sfnt_off00012569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12569 17008 bytes
SHA-256: 2c6a081399c06f6ff4a5daad49a32c9fc267ca4cb20e012493c32f749e28b787

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