Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d4b7546c4d773e…

MALICIOUS

PDF

139.6 KB Created: 2021-06-17 22:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 01793615a814e7b449167a5e8f6a7af9 SHA-1: 5a16392ca80d4319951518926266d9130cb8b805 SHA-256: 02d4b7546c4d773ed5454feffa09f59e2467dd38623c2ad011bbc05b2ac693ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'Danganronpa 2 trial 2' and wkhtmltopdf, likely as a lure to disguise its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/7282a6b831012593e7d08af69e7f71ed/fodiredososupalu.pdf In PDF document text
    • http://chinalanpa.com/images/upload/File/lopabanubujar.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/8c7448be3b1b5573cfd3d47ed614fe18/90063705285.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/sqpk8d3rao0g905lcv13c94euv/ladajabimazujeful.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/9ch5drep7hh31q5q25tr0cqcg1/63120363114.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/grh6j6ink6ch3pibentcjpvh29/rolizakibamuzago.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4671b5281---zukum.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607e24c223a33---68085759910.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/342e5e7c3ea04d65619d8cc00c03accf/luwetuzuxovibomepaderafel.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865f84435ad---buwuzenorujezatakitej.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160831cf1624c2---89432461775.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/tesulilirekasiwarun.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/14177288510.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6383d96d96636383a4051f2cda268449/26942950983.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160803e683351b---wizifeteweferidinub.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210617184924.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ca7b4260b---4225099769.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca81a7d251---kobalanovidikib.pdfIn PDF document text
    • http://industrialdevices.in/uploads/68534996533.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=danganronpa+2+trial+2PDF link annotation
    • 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000175de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x175DE 29644 bytes
SHA-256: a88163d56a4e574c2ffd90b18fdfccd7c684e1d3716d03871afcc2dadde40080
font_01_sfnt_off0001d1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D1A2 4940 bytes
SHA-256: cffe467f9f792069a9a2597399bbf60def79f849b835e2779186a6f8ccdb3782
font_02_sfnt_off0001e28a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E28A 11732 bytes
SHA-256: a7f576789d5c226e84ddafbfd23ea4fcc8519fd0eccc2fbb876d06d2267ca954
font_03_sfnt_off00020a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20A68 16456 bytes
SHA-256: 4854ac55fef8a49fe00313b5c5b5d6bb4ed009bcd3ad9dd9c379a1e804d2ec9e

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