Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c5a129b974dc3cf…

MALICIOUS

PDF

91.3 KB Created: 2021-07-30 01:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: abda8f4b39fb5386cce26ff7c7cf1e88 SHA-1: d11b47b954e57cfbe8a0148601256371b390fc9b SHA-256: 1c5a129b974dc3cf1bc08a0186221f97dc64e89b06317dc55b5e2a58bd774820
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, likely serving as a link farm to host malicious content. The presence of external URIs and link farms suggests an attempt to lure users to download further malicious payloads, aligning with phishing and malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f602c0daf67---2521161348.pdf In PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da7315e657---52154740795.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f4dc5b6943f---86929706843.pdfIn PDF document text
    • http://rc-modeller.se/images/file///64711314119.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/tekobe.pdfIn PDF document text
    • http://tivati.com/uploads/userfiles/file/pafonezo.pdfIn PDF document text
    • https://wietsevoermans.nl/ckfinder/userfiles/files/tobujafamu.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0aca68f31---55494329611.pdfIn PDF document text
    • https://mytopics.it/uploads/file/kobetak.pdfIn PDF document text
    • http://www.ruben.pl/ckfinder/userfiles/files/16439612805.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bf20b240bac---11937146012.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/8b27fd3968135140b6f35a6a5b6ab991/padagorukebetigakibitu.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/damaduvetebumazowebaxas.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/7835312006.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/1cb6488a6b289f09cff5a7894ed68b8e/kawebukovowabe.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081e459a802e---93208793212.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/nidawuvi.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160f7a7ada02f3---nujazubusumugojesuni.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/54389197634.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/fakilujodaf.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160836ff084892---nojixeka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=descargar+libro+atrevete+a+so%C3%B1ar+ignacia+antonia+pdfPDF 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_off0000e44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5B 16276 bytes
SHA-256: 98aff72f982070a5baa77e7b7d9d202cd92db0f7bde72b24465478209f81d015
font_02_sfnt_off00011250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11250 18408 bytes
SHA-256: b1f652db8e34e32d2814ed762fd7c2d4f9e8661e8277e91596c6124eeb593af8
font_03_sfnt_off0001413d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1413D 11208 bytes
SHA-256: 0722281214fbe5ba1d3f972e89e973926d7d6ffd46e3b9f4d6d64f7f46c55fbf

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