Malicious PDF — malware analysis report

Static analysis result for SHA-256 60502e1be0881219…

MALICIOUS

PDF

92.9 KB Created: 2021-07-14 10:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f225a20e3b9a0156c61030a4e5433014 SHA-1: 2633a5db09f6d81df7b379f779e6dabe0a63bb3f SHA-256: 60502e1be08812192a06da77a0f8af2bb852abbcd9bb098756b9ca3014ac7836
204 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a security bypass heuristic suggests the document instructs users to disable antivirus, a common tactic for malware delivery. Numerous embedded URLs, many hosted on compromised WordPress sites, likely serve as lures or download locations for secondary payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://wastran.ru/uplcv?utm_term=keep+talking+and+nobody+explodes+fr+pdf PDF link annotation
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/4748da3bc3bef04c86b139b35945edfb/79062356555.pdfIn PDF document text
    • http://jkphotocon.org/data/userfiles/files/24947869550.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/86339521572.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/aaor29ecjujvgvg6lh2nnao3g0/jesifozonijafamufubiwure.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/af954ecf55a78f70987304aa88f158c0/dunegifanaleden.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd77f9f5f1---99333695339.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202107090750163432.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/719fd4c28d81b335d63431906be1fe69/62744629496.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16088045852729---kazuvumizunegufobubuxabeg.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c416f938f0f---fogolozegirodameduwoxopeb.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/boxivuvijuva.pdfIn PDF document text
    • https://kristinanamaste.eu/files/44317064780.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607578d622937---99855026781.pdfIn PDF document text
    • http://apvn.info/userfiles/file/59012564339.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/zirurisi.pdfIn PDF document text
    • http://nakatka.com/files/file/dutoram.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/993abcc60a2f48e890d27eed289ecdc6/20562799324.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/f0586c2b5b7b58a16edb28dabda3b8a2/80073553046.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/16579248652.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/vovepamer.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/50jqmdg1jtij6nleec1eiq6bt1/57580811610.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/zadamolugotadetaziso.pdfIn PDF document text
    • https://advertisementnepal.com/ckfinder/userfiles/files/joniliju.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7eafbff27---sugupodusopowuvevewifexa.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dd8b3536a---80606260710.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE861 20828 bytes
SHA-256: 1f9dae16eb9ad326c966e28520262067e90b0227ced5ed32f9c38b813d91fcee
font_01_sfnt_off00011c4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4F 16204 bytes
SHA-256: 2f37ea1b11ece644fef2f420fc5d5e29c860255d372ec3a711666e2589675489
font_02_sfnt_off00013201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13201 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A18 11112 bytes
SHA-256: 7c09eba6d2cd64c41a781c83b7620d21f923ee5a72e7199a48b0d7b527f44d6d

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