Malicious PDF — malware analysis report

Static analysis result for SHA-256 5abdf6abe574cc1d…

MALICIOUS

PDF

70.3 KB Created: 2021-09-04 09:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 95977746fe2542a4e23e1f799d1bf2d7 SHA-1: bf3070b79a752b21e0b4be4a6dce6b00fcc69179 SHA-256: 5abdf6abe574cc1d9fe87ba94ed2b6cb3828666f84766ab9c531e78796efe9c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites, suggesting a link farm or redirection scheme. The presence of embedded URLs and the nature of the heuristics indicate an attempt to direct users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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=mathematical+sentence+worksheet PDF link annotation
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858859cbf6c---gigukonerobixepewipe.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2273a610a5---26762608385.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/pezabojebimuloxikugomaxeg.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749f90ca9f4---vexujagutix.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/tivoxutotusezazerasuf.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/67663464597.pdfIn PDF document text
    • https://rajaketiga.com/contents//files/movibeme.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/7njnk4hchaqbgpb35op6isbp3s/dujopugujuxowitebizusux.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/93393891377.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/jekizelasodewijajokubolad.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/xuvikava.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886d36c2375---sabovizizine.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/9d7e946a2f0c2ca9401775e4e466bc46/35596482237.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084d99de51ac---56130529189.pdfIn PDF document text
    • http://xn--42cfa4ewb0a0b3fwh.com/imageupload/files/85767234713.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d263ae2f11---nezukegiginizev.pdfIn PDF document text
    • https://broadcasthub.com/ci/userfiles/files/puvikuxaxofawuzu.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5902490f5---49918654508.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/71743949350.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d626916c1---fogetexozulaxadutewib.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/59990859268.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/20607696759.pdfIn PDF document text
    • https://nulifeus.com/~nulife/userfiles/file/47723700683.pdfIn PDF document text
    • http://skncn.com/u/files/lejoponujimufeputa.pdfIn PDF document text
    • https://led7.ru/file/264778567.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_off0000b477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB477 10664 bytes
SHA-256: 06063db0ab9aaccd2b2f6e7fd15273cce5562859040d08e40063e5418c5a5ccc
font_01_sfnt_off0000cccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCD 15388 bytes
SHA-256: 1d027527d18ae9d307ccffdcaefbd19d556953cb0e6193f56c625560188031bd
font_02_sfnt_off0000f3f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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