Malicious PDF — malware analysis report

Static analysis result for SHA-256 d72eb1a364e0b2b2…

MALICIOUS

PDF

99.9 KB Created: 2021-07-03 12:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c36159d59165e75f07239f5fa2970319 SHA-1: 1fe3defa07d9f2ad4ab66b825458897c2968e01f SHA-256: d72eb1a364e0b2b26af03b08733289b85971923a4fb8bff0ee63264d07cf85e6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple URLs hosted on compromised CMS upload directories, suggesting an attempt to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

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://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee91febbd6---nilonajozeg.pdf In PDF document text
    • http://dwhs79.com/clients/15834/File/boniganetapoxujejosusuzeb.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7cd16d74ea---virojarejijuradamewerax.pdfIn PDF document text
    • http://elesi.eu/fichiers/files/fidogokogosixejam.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/82716347822.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/48372655927.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a76ea9057---51603921665.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/7204102627.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/wotopokakawokikonuzisu.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/5a93f7797258746b8208f201b77d2219/tovuvabuwefaditake.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8d62100ae---36805716522.pdfIn PDF document text
    • http://benetalent.com/upload/files/4831354411.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/9f7715255102369d1e54627e40e13c1c/21768716116.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608d862e7341c---76132543062.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/75619ddbac68cf75072e70383b037980/dujitidaj.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160cdb5c178c41---91154259676.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/64a828aed34a0dda57b706ced9836c35/92476106107.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607292247a9c0---94174438133.pdfIn PDF document text
    • http://lsbwg.com/ckfinder/userfiles/files/20210610/0630547192.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/4f143c7ced6d651888b2da3a0cf5ea62/93670621445.pdfIn PDF document text
    • http://mytmbc.org/fckimage/file/86095611387.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/32272893894.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/618160391.pdfIn PDF document text
    • http://fundacionecla.org/resources/original/file/wabinafuxuruvu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=what+level+does+budew+evolve+in+pokemon+platinumPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10070 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001187d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187D 2036 bytes
SHA-256: 5cdeeb8177ef21ed6ae4615157799a8a196b361a999e88d01aed8ae5e418283f
font_02_sfnt_off000121db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DB 11036 bytes
SHA-256: b9ed4e729e9ea868a6e4670b3d2b9a2e1a40b6ae05482cf929f592fc4515304f
font_03_sfnt_off00013b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B25 18028 bytes
SHA-256: f13fbe84be301b77c31053b4594b50dbb48070425f8b38d023f1c33f372fb7bb
font_04_sfnt_off00016af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AF9 16252 bytes
SHA-256: bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4