Malicious PDF — malware analysis report

Static analysis result for SHA-256 96696bce6fdce5c4…

MALICIOUS

PDF

80.4 KB Created: 2021-09-07 10:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 21638eeb3621a8b966ccfb7e350646ea SHA-1: 005f2043568ff736af018224e05d7cd42136dffc SHA-256: 96696bce6fdce5c434f0db4293b57bf478d7e4bbbd10bbe792cec65ca6128aab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to exploit users through deceptive links, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ba230b0e3f560217ac1e26f9a01e78f3/gisapijo.pdf In PDF document text
    • http://divorcefinance.nl/uploads//file/boparadotijevuparivani.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16089d526bb983---lalukolafofepagu.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/mezisabaxelotiwewuxoniv.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/jivotekewosujebimebilitig.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/zegefije.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/67451018083.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/161265986bbbd6---50378325593.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/4be16ee2102c0989318b8ba4f675ce58/jodufolijolano.pdfIn PDF document text
    • http://ge-mak.com/files/18222788801.pdfIn PDF document text
    • http://henri-ruch.ch/doc_pub/file/talewazewajinikajuvude.pdfIn PDF document text
    • http://www.tlo.ntou.edu.tw/ckfinder/userfiles/files/67492895951.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/37841988789.pdfIn PDF document text
    • http://bakersfield.thepokeluau.com/uploads/files/55639081872.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/amib4gac6i2bp71rdhthsikp0e/40411055858.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/0656a1a7a66425310d247030ffe35f5b/56025365186.pdfIn PDF document text
    • http://hainfelderteich.at/18938737005.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/suxez.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/dagajaberinitobuso.pdfIn PDF document text
    • http://fitviewer.de/files/file/74105471427.pdfIn PDF document text
    • https://premiersuli.hu/files/files/46180251276.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/ee12ec4a301c33eabd3a6153a51dce3c/50900559945.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=beginning+division+worksheets+for+kindergartenPDF 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_off0000d688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD688 17048 bytes
SHA-256: c2de3af11b95019b36efd2e7e027999795fceb12c0e051806826771e3d3c917b
font_01_sfnt_off000102bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BB 10884 bytes
SHA-256: 54226015d8d154b5896a3630b0242f0c5cb72eeb50b4cbfb711f2531db792d44
font_02_sfnt_off00011bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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