Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd927a12f97ac8bd…

MALICIOUS

PDF

77.1 KB Created: 2021-09-23 12:13:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ddcd6065980e24ae3589d88b77bf671f SHA-1: 3a6ae85eaf8eef7a7b2ce554a616ce87e2d211ef SHA-256: cd927a12f97ac8bd74c4f23a13ae59e32c1da1a93a1e4298e37eaa5c20f63a26
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers also indicated maliciousness. Heuristics identified it as a link farm, with many URLs pointing to potentially compromised WordPress sites or disposable hosting. The document body is heavily obfuscated, but the presence of numerous external links suggests an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://mimpishio1bet.com/contents/files/molovumofetoziturake.pdf In PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/o1a5eo6flj6d0efevhu9srn755/jexemeda.pdfIn PDF document text
    • http://happy-land.hu/editor_up/xedoson.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/77428940752.pdfIn PDF document text
    • http://vinczeandlaszlo.com/upload/xuvedubedomepukop.pdfIn PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/67990050645.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/e646f1aa3378e0067825eca7b7a75c22/dopojis.pdfIn PDF document text
    • http://geonatlife.es/ckfinder/userfiles/files/78411682440.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/dobujexar.pdfIn PDF document text
    • https://myagenda.myagenda.cz/pictures/editor/files/35769693863.pdfIn PDF document text
    • http://drzwiukryte.pl/userfiles/file/95020323849.pdfIn PDF document text
    • https://bibonatura.hu/ckfinder/userfiles/files/31886317832.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614698e0acf4b---64826404995.pdfIn PDF document text
    • http://artattack-concerts.de/files/file/46297308381.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/34d4b1a5f0adf522bbe76e9526c4a728/78354142184.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/b9982569b9af87012b82692827a32cb0/90350697477.pdfIn PDF document text
    • http://tamphuhiep.com/Images_upload/files/62767465341.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/67147773944.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/161454f4d27f73---saporalivigisud.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/26720158849.pdfIn PDF document text
    • https://blokhol.com/upload/files/terezirimitani.pdfIn PDF document text
    • http://lor-rostov.su/userfiles/files/buvawuweranokitojinamiw.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/94935422983.pdfIn PDF document text
    • https://sin-wa.tw/app/webroot/userfiles/files/birudupami.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/bojozumunarewajaza.pdfIn PDF document text
    • http://jaqalsports.com/files/file/35470264139.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=naruto+senki+forget+time+apk+downloadPDF 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://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_off0000c855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC855 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06C 11096 bytes
SHA-256: a7edfa5e834c97b0d684d9ee9588f03f465ff7ac0a933ea22f8950c950e9f3a1
font_02_sfnt_off0000fa28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA28 17324 bytes
SHA-256: 5e69c753a7115d2bb40e4e3a8fd31e39a089b7e7135d0946178e95a9b4575c7a

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