Malicious PDF — malware analysis report

Static analysis result for SHA-256 69201bdb688c0b3a…

MALICIOUS

PDF

68.3 KB Created: 2021-09-26 02:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: aba7fa7b1ca5637cacbf1d29b3a00195 SHA-1: 2fd40613c45e728eae619e251a97c0eb2e4092ea SHA-256: 69201bdb688c0b3a42c9fa3db393d4681243f64982e14db3c738e74a8c1d1985
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document is identified as malicious by an ML classifier and exhibits characteristics of a phishing lure, including being image-heavy with a click-outward action. It contains a link farm pointing to multiple compromised CMS uploads and disposable hosting sites, suggesting an attempt to redirect users to malicious content. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/dabefafegopixibisovobidak.pdf In PDF document text
    • http://tcgardening.com/userfiles/file/2021092202383273499.pdfIn PDF document text
    • http://www.americaninvest.net/upls/files/mawedetosagup.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/55455035664.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/0an3osps1brjj2a550ab030at2/fititamovur.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/21703986076.pdfIn PDF document text
    • http://nasfthr.com/userfiles/file/97240896792.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613697c44a077---pefetunef.pdfIn PDF document text
    • http://fteq.ru/files/file/26488693882.pdfIn PDF document text
    • http://vino-charlie.cz/userfiles/file/wesetobilogak.pdfIn PDF document text
    • https://sanagustin.cl/files/fezibesewaziboz.pdfIn PDF document text
    • http://culfordequestriancentre.org/UserFiles/file/43865097102.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0f9130d16---92371894961.pdfIn PDF document text
    • http://secretinvitation.net/images/files/51230585632.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614acb3980bf8---53446973324.pdfIn PDF document text
    • http://bitree.net/ckfinder/userfiles/files/vevojunavisaseda.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/igtdngd3eiuqbq7pn1gj83dok6/37046731790.pdfIn PDF document text
    • http://alltechsro.cz/files/61227242512.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///43712071832.pdfIn PDF document text
    • http://daithanhnam.com/upload/files/jikakekodemolewotokukijad.pdfIn PDF document text
    • https://ecoquimica.cl/dinamicos/uploads/file/sadizawabibifu.pdfIn PDF document text
    • http://engcaphone.com/_UploadFile/Images/file/1654152297.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=casual+rpg+androidPDF link annotation
    • 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_off0000b095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB095 14220 bytes
SHA-256: 18ee713aba863eaedf772b25048224d018f2ec26bb7206fcab8d6a1db85cc1a2
font_01_sfnt_off0000d43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC52 10468 bytes
SHA-256: 11bee25714f8f3795f676b67b19a01fd21b4686f948bb6f92adeaf4b09b353b1

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