Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca8397cf5acec13…

MALICIOUS

PDF

74.5 KB Created: 2021-09-21 05:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: e357905349aee1b134739543e2f79d13 SHA-1: 07e71f1d0055fd2f0bcad8e0cb65f29c86b1e198 SHA-256: aca8397cf5acec13023e2c30deec7291c1a176e3fe2edf44020033f9a8e32476
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the overall structure indicate an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://oniceh.ru/uplcv?utm_term=parwaaz+hai+junoon+full+movie+watch+online PDF link annotation
    • http://driscollandgibson.com/images/edit_images/file/25615984785.pdfIn PDF document text
    • http://chipmax.in/chipmax/ckfinder/userfiles/files/zagosalovakapodijujetat.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/bedoratirakafojiko.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/mutewejimekixululazegibe.pdfIn PDF document text
    • https://zenit-npk.ru/files/file/11518014784.pdfIn PDF document text
    • http://songdolandmarkcity.com/userfiles/file/57474326121.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613acb9227874---gijozaliwozavilen.pdfIn PDF document text
    • http://lamay.de/userfiles/file/repiragapajivuzunabife.pdfIn PDF document text
    • http://kyochonbuenapark.iorderfoods.com/uploads/files/sitaxumosovubatemu.pdfIn PDF document text
    • http://onlinetradeshow.ir/uploads/files/62956896635.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f95774f340---80091297025.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/16771c5cc362d2a571a7ea68730a817d/lamoga.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/77618718776.pdfIn PDF document text
    • https://osakadentalcare.com/contents/files/jasanonujumebadisemuni.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/87994722811.pdfIn PDF document text
    • http://cheniou.handysociality.com/upload/files/42441685507.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16138e61e6a045---56669261035.pdfIn PDF document text
    • http://giustizianuova.it/userfiles/file/76522631365.pdfIn PDF document text
    • http://win-sonic.com/ck_imgs/files/81300210079.pdfIn PDF document text
    • https://reclamesticker.nl/images/uploads/file/In PDF document text
    • http://kruengrangthai.com/files/files/lazipanazilokikogenibemus.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1613df48c12575---91795485033.pdfIn PDF document text
    • https://b2cdemo.tickets.com/content/files/3749290476.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_off0000c09e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC09E 10876 bytes
SHA-256: aad101b529be347734e4153b43c123fd351c97efe8dfcc3384a9ef0b2b0f533c
font_01_sfnt_off0000d99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AC 16668 bytes
SHA-256: 1a4006c8e6b7889e02847ca910a0decb54659cc13ac952d00daf9de8cbf77364

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