Malicious PDF — malware analysis report

Static analysis result for SHA-256 043fad72d08cfe5b…

MALICIOUS

PDF

88.4 KB Created: 2021-07-03 15:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 057a46cf861e46b8474ebeb667bae729 SHA-1: 2b46f27327153dce3b9435d848673dc4856f8ee7 SHA-256: 043fad72d08cfe5b7138ee3c4bc53725f196dbd0e66752db8bb4d72a4fb038e7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised CMS upload directories, suggest a link farm designed to redirect users to malicious sites. The primary attack pattern appears to be phishing or malware distribution through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://pixomot.ru/uplcv?utm_term=hotel+receptionist+job+interview+questions+and+answers PDF link annotation
    • http://anhbanglaw.com/userfiles/file/buzekazejefejur.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c0df9a401a7---5716028147.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/85i9mjegn6ieabitl7jbd0ege2/1574318583.pdfIn PDF document text
    • https://justbuymeds.net/userfiles/file/92547541141.pdfIn PDF document text
    • http://abnicum.com/files/file/8416614518.pdfIn PDF document text
    • http://portaldo.eu/contenuti/upload/file/pepawopojigazasefuxonowi.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/ff48b6566da979010fcd5f5fc881f728/43551332993.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/sogujiwonuv.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160845c21aa04f---99140163987.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/123845c3c6a8f74e8794f64a77bddff5/84793445905.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/b2c79031b40b774c058cb98d911cdc39/30558836554.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/zesaxivesunes.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/d0l2cgfsgicdbo3nfa037mhhi7/lurasokiwedose.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/75218301602.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///52411376404.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/t1kh9vfdosq0rm205knucp925b/koguv.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbef8ae0b0---88460226030.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db4bf14d33---769383030.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b44fe57efe---lepivenakezu.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/96586686946.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b26c8dada91---7794041610.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_off0000f68a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9C 17268 bytes
SHA-256: 9d2e9a9924f7b325f34e5c796d7dba35b6cc08ba868caaa98bfd3adf1aa6d576
font_02_sfnt_off00013a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A8E 11164 bytes
SHA-256: 4bef995260b63dcb3758a5d6f08bbbb962707e4dd258f3dd799e026cc219b0cc

Open this report in the interactive analyzer, or submit your own file for analysis.