Malicious PDF — malware analysis report

Static analysis result for SHA-256 578a88c673e12c8a…

MALICIOUS

PDF

78.1 KB Created: 2021-08-15 03:14:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 659a5e7d06683c9a560c1b6c2145e020 SHA-1: 8753b9c2768ac5de12b638b12a721f36895e7e4c SHA-256: 578a88c673e12c8ac6966495700438eef84b5c455a6ac05add5642364cb8a748
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate the PDF acts as a link farm, pointing to numerous compromised websites and disposable hosting domains. These links likely serve to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://agronlogistics.com/userfiles/files/55299357626.pdf In PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/4gl5skdbiplpath82jb5kh3763/wedozarepe.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/4299498845.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/1p1pn09u1d5hgpvan9u57esov2/64533568668.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f98ddc82a---mapijibufesajive.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/nabanirivov.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086fb4385272---bakakegugijukugulaxuwix.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/7e641ade0d836f5cd318fe884cacd2a9/69952181189.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/vewewenubir.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160be02133c2b4---78152209771.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/34045043825.pdfIn PDF document text
    • https://iohrp.org/f_files/files/70506626184.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c43d2daac---sedirefapopexe.pdfIn PDF document text
    • http://tonystelly.com/clients/873487/File/zagupoku.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/90597066393.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/76331165749.pdfIn PDF document text
    • http://dhf-china.com/d/files/mapaxi.pdfIn PDF document text
    • https://westhigienia.hu/editor_up/xujufosimu.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/17694557003.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/a91fff14b3508dd442d225888c529b12/nutomimumo.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca1af88395---91609854405.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd1f39ce9c---zisazoluwopefu.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/98026755117.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=area+rectangles+triangles+parallelograms+trapezoids+worksheetPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3A 16204 bytes
SHA-256: c73e2c1e45ef87a49835e301911660c280b25daf8bf6ad68026f034e45194c93
font_01_sfnt_off0000f806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF806 11180 bytes
SHA-256: 4eaa175019ac0a26ea82707762bb25a9e9ffc8d8edb33ec6ac6293cdc005f575
font_02_sfnt_off000111e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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