Malicious PDF — malware analysis report

Static analysis result for SHA-256 249e2a1e756e2369…

MALICIOUS

PDF

71.1 KB Created: 2021-08-27 18:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b2149a4b9c967530477985b92e6f4321 SHA-1: 937d9dfac3af4c13335c9d8f7f34d898457a0723 SHA-256: 249e2a1e756e2369726ce21566827bc4aacdb5358e23a432323574b1f5866e45
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and potentially disposable hosting. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/sg0pnr2odnqfa11d0nhlobehq4/54223124398.pdf In PDF document text
    • http://mgocsm.in/userfiles/file/bikazanevazefudufufe.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16096825380ebc---foradubudunivujilunaned.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdf5b180ee---gitijowizepefoma.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b11e5553a---sigeso.pdfIn PDF document text
    • https://homecareangels.ca/files/files/files/46823100690.pdfIn PDF document text
    • http://jingyilin.org/uploads/file/tojuwokomufabina.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/e0d2c13b3909fc5ce60f96b4f7bd2b32/junozupanalemudemukakev.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/161042f1c9cea4---49584025094.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/novilamukizufatipudiw.pdfIn PDF document text
    • http://dmychadla.eu/UserFiles/File/wazidujojamazax.pdfIn PDF document text
    • http://slp70.com/clients/873855/File/2870770488.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/7cc65a45c9a0d2deb7e19aeff7bb0c02/vedupeteri.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/rirumurizezabajasedax.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/9710338815.pdfIn PDF document text
    • https://j26clean.com/upload/files/14100092978.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/b0d40d45f2d10ebdce42febb419393d7/gafopuxibobirawazi.pdfIn PDF document text
    • http://novastal.pl/userfiles/file/xetemovutadupolikopizog.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/1762715528.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/16842907518.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/c2c9c3f537179efb54ae39c2c26cf53e/zididemunapi.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/lfhnb08bt75ffkbdci0s4g3mrb/24125034401.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ac7826ea20---dudewosederolujopagotima.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/46940557212.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=compress+multiple+pdf+files+online+freePDF 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_off0000b6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6C7 15576 bytes
SHA-256: 9a418afb38c2cd2122408fdb43cc35e16d03096ae4aa1a530a3a9f7b8a3beb7d
font_01_sfnt_off0000de55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66C 10628 bytes
SHA-256: 2ae85101cfe0e797522dd2ad141192e4ded221ea846efa75da19530f7b6bfa46