Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f67941e16a214d2…

MALICIOUS

PDF

98.0 KB Created: 2021-07-09 06:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: c72386e0860f221847f7d1c02f56824b SHA-1: 5505343d1288cdb6b73dd81c939b7aa03a66ec98 SHA-256: 0f67941e16a214d2fc47866f9ed3845f3ce44692fa814b1b94ccaef2338111ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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 http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbadf1ca62---26530805551.pdf In PDF document text
    • https://hosvagyok.hu/userfiles/file/7554077404.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/muvevabagub.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/91809778515.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/puluvujesixejozupawera.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/67345415237.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070bec9078e4---49429025099.pdfIn PDF document text
    • http://soflocops.net/clients/81266/File/daxalepowapolejarar.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1e6e15ff0---tawiwivovufimuzol.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/vqadolqopbp5p7d3pmq9tuooak/17636918415.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/60487063838.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ipbrnn8ckpchgpnsq4u5sr4meu/gexemaz.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/xovenakabutelepokejadeba.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/30837611398.pdfIn PDF document text
    • http://iehyun.com/editorupload/file/bonabik.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e32f43261---46382784872.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/c479d96b5f0e4b41a8f39d4c27a6d476/xaruzito.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/fefuliv.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a8750c3a0---28001939039.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffde256fb9---xibulaxubage.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/legukitipi.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/benanakuditopaf.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/565481b023dcd2308fd9c3763b9f3ce8/77571012164.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607fce8584c21---wuxutosaxivemomelilazaki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=new+english+file+pre+intermediate+end+of+course+test+answersPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12661 11228 bytes
SHA-256: a77e9575809eb8fec28ce8e2938712ca51fe3b9ba4d4662d55540918d91c916c
font_02_sfnt_off00014051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14051 2220 bytes
SHA-256: fdeee9aed3307597c8799c3566b010615eae14bf849f15ed78034e448c628c71
font_03_sfnt_off000149ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149EF 18868 bytes
SHA-256: 104658e271dcbeac1078447d43569459e4b2320615aa2a208c85b6e476706fb3

Open this report in the interactive analyzer, or submit your own file for analysis.