Malicious PDF — malware analysis report

Static analysis result for SHA-256 32129febd2cf0038…

MALICIOUS

PDF

103.9 KB Created: 2021-09-06 01:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d234ee948078ed8c5531a028bc962425 SHA-1: f19bd33894084da70c8e7b2a50d9810279db7665 SHA-256: 32129febd2cf00382cb72a66feeaec7bb77abe795d8e7a256a898fc1ebd1af60
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the nature of the URLs and the PDF structure align with common techniques for delivering second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://inwebjor.ru/uplcv?utm_term=2008+suzuki+boulevard+m109r+owners+manual PDF link annotation
    • https://churchofgodinjamaica.org/app/webroot/files/29765959141.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/86835717888.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87155d3251---bogusigopobovavorilab.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/99507714607.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/44826516356.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/8d3eln4q7crj9ja85vl2o1nju0/48498161233.pdfIn PDF document text
    • http://homearcky.nl/userfiles/file/zoposoxojap.pdfIn PDF document text
    • https://restavracia02.com/userfiles/file/zagataletafixadufefi.pdfIn PDF document text
    • http://jinshi66.com/uploadfiles/files/91871228221.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/93bb406d99340c90c3f26d35c4745bf7/96769138281.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/51183373250.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/sowegexelumom.pdfIn PDF document text
    • http://xn--h1aaebbkfib4a.xn--p1ai/sadm_files/nomaritodoxobazurixiguxi.pdfIn PDF document text
    • https://xn--80aanugxqi.xn--p1ai/admin/ckfinder/userfiles/files/97450830470.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607def9e7cd07---56951181080.pdfIn PDF document text
    • http://rld-carbon.com/file/janinegene.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/fevesotabimo.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/5251950089.pdfIn PDF document text
    • https://intellicapital.in/ckfinder/userfiles/files/22215250120.pdfIn PDF document text
    • http://limuzine.md/userfiles/file/sajubawuwise.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/95890738421.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/bagogenoxoxiletotumavuz.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/pipokesawotasu.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/p1d2tgklq14u5bks64hr2rb2t8/77501968866.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/1d2b7ea16379c9e774ed2217b4f4ddab/pivaletukuwiguwonipar.pdfIn PDF document text
    • 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_off00012488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12488 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C9F 11428 bytes
SHA-256: faf4e32504a2c704868ee47fa046665537048e0a4141b48754d433c3421d74dc
font_02_sfnt_off000157c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157C1 21340 bytes
SHA-256: efaa7b708e2eaf614ec00cae1c6b67c78adc14c3ba53da7bcc00ef83595160f4