Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ad4be1195e9934…

MALICIOUS

PDF

85.0 KB Created: 2021-07-14 01:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 49b23a67fe3a55c620ac66bc589080d2 SHA-1: 90e9b82f60814d7badcb770ec9accff0078ced56 SHA-256: 80ad4be1195e9934d5308fd434b3bf56edf63a83a79548fca48af4cbcfaf30c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to phishing or malware sites. While no scripts were explicitly extracted, the nature of the link farm and the detection as a 'Phishing.Trojan' strongly implies a malicious payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://gamaconsultores.cl/upload/file/rutinalepa.pdf
    • https://nikosdimos.gr/userfiles/file/gejigewamupevemino.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609152bcadbf0---46745751414.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160719f62b4297---33067056587.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/8d824df405e4bfceaae7463ff2b13f60/razolesug.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/386959f65618648d103841e6c4bb606b/16021312122.pdf
    • http://sovaimm.it/userfiles/files/sedifigomaga.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b089cd6fd2---pekizazarabugitonegab.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b79a4f2b7f---mawupu.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16098369ab5d4a---83269931924.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a24898e9a---39707373339.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c2b754f6f---43577465560.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dac4bedbccb---21897780368.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c72946623---jenarokakuwikowowemoxu.pdf
    • http://vicorsupply.com/uploads/images//files/77993584814.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075e1293d363---dexesisanageno.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/s8cuh9116be1qka8hp98ah0ljf/megifafuvenigegamifuladu.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/4f2dd03a1efc3df8db313aba4796d49e/63141983158.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608457088cd75---52803149307.pdf
    • http://guowangcable.com/d/files/telasupagabefakixu.pdf
    • http://krevue.cz/UserFiles/File/84268544499.pdf
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/709f095e6cee3701efbe1d2b62a8c9ca/taruzudefizolokadudawif.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/k144524uvavmf1vsct1dqorh6b/78663795450.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=3+adjectives+that+start+with+w
    • 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_off0000e8e6.bin
b922dbe609ffe7341a35ac0a92e8837a3ddea4f27d6523cbdd815eb7d4194e3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E6 16972 bytes
font_01_sfnt_off0001150e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1150E 16792 bytes
font_02_sfnt_off00012d25.bin
f5e5ad38c89f0a9d0bb64c2c1a13328b9d5acf622ace67e777194ef366aa6b95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D25 10552 bytes

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