Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceabe5dfc3eafda4…

MALICIOUS

PDF

89.6 KB Created: 2021-09-01 05:18:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ac6d4a5182d01fce9d6feb296c7cb180 SHA-1: e348edf229b1a7bda92bd648cf4e955ffee4e03b SHA-256: ceabe5dfc3eafda4c224544076d4effbcbf754b392cbb288efd1b4cdae863f77
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it's a link farm pointing to compromised WordPress sites. The embedded URLs suggest an attempt to lure users to external, potentially malicious, content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/uplcv?utm_term=in+the+beginning+god+created+in+hebrew
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160841c72bf670---gepebapububipumeluv.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/p50fii999oll66oj22ihtv7fl0/52868331970.pdf
    • https://irantruck.ir/data/file/93985848265.pdf
    • https://baigiangtoanhoc.com/upload/files/77830191093.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/5b0174451680836697c294d6ef32e1bd/dozobizuj.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec3a88a4b1---dusizadig.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/ca6cfa13ee19fd3e3668ee3508afd7a8/37926926158.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/418fba78e2541d2b47f6021b11942d91/mezejopi.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/bm3ftjcl19fvgupag58o7ono7h/lotuxifefasewugedeloxim.pdf
    • http://ihdbd.org/upload/files/keluzirufeximotinuxiw.pdf
    • http://tokyoracing.hu/userfiles/file/gexemasowukawapu.pdf
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/99631871754.pdf
    • http://tl-maskinfabrik.dk/userfiles/file/rezavejesa.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/9a9730386f795e5edcf1ab8cb2d0b952/55413792388.pdf
    • http://netisiletisim.com/guvennet/resimlerfiles/jilemesatinejotiwovigubom.pdf
    • http://brno-skoleniridicu.cz/ckfinder/userfiles/files/zajulimevo.pdf
    • https://123natura.com/stockages/files/28335833166.pdf
    • http://ferrogep99.hu/static/media/file/memagulevelede.pdf
    • http://propactionvehiclesuk.tv/userfiles/files/8627044188.pdf
    • http://www.klimavill.com//data/editorfile/zegukazi.pdf
    • http://headlinesdinerla.com/uploads/files/batugowezanu.pdf
    • http://mediedil.eu/userfiles/files/pabuzebiradutesujuf.pdf
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808c62ce71a---lofiti.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f126.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF126 16792 bytes
font_01_sfnt_off0001093d.bin
72ab27a5ee16f781829c662594509d1d02aaeaaa2286938d3ff7d0fc3b8695f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1093D 10612 bytes
font_02_sfnt_off0001213c.bin
f0b1569f794085a5739e20a8fdc76c31c73be25cbf8b1f3c3d9fc01ea6c626b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1213C 20856 bytes