Malicious PDF — malware analysis report

Static analysis result for SHA-256 192e13633905b7fa…

MALICIOUS

PDF

114.7 KB Created: 2021-07-02 07:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d9b82e9f72d01f18013cf01ca8e47754 SHA-1: 7d2b8fd8f6ec558752d01437ffda2f977510a187 SHA-256: 192e13633905b7fab19e6e81dcda80bf6369072d22030c38f0aa44970ce3997a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories. These links are likely designed to redirect users to malicious or phishing content, a common tactic for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16074fd62d0eea---zadijofufibilopanililiweg.pdf In PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/9f8674e6bfa259d826bcf86f03ef7270/58606930335.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/9c156fd6c7aa0128e8466707d4e92a7f/ninoxinogelurekezasipete.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/wanupekibajav.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/sugojalanakapazab.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/74128546125.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/zogubonenop.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/krs1veru9bjl19eh3k0l7lluq1/mapubowipopizalidadev.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608506aea551e---77659453917.pdfIn PDF document text
    • http://babamoleskine.com/files/file/fadosi.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b38e71205.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/4db7b6oj10gk87m2pn8vpvb9o7/jenogu.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/47744013128.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/b9afb5943933a823cbab8920f694bc38/92082351826.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c449fb22b95---nuxixoxud.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/17747637955.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/25606997604.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ace76a016---mofut.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/33781308873.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608797edad898---47745044456.pdfIn PDF document text
    • https://tasivn.com/upload/ck/files/piwupubatadisumuwuzezuguw.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2788603ef---lekadoguwanejimekokaf.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/31784288828.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=command+and+prohibitionPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000175c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x175C5 26088 bytes
SHA-256: d7961937ec58bb4440add0db9cc59ebb1f83828aa0450840342ad688406afb11
font_00_sfnt_off00012f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F9D 10484 bytes
SHA-256: d1e0d353ccc656c9a2101709aa44018687e7b73f58a52dc148ce2b5b23079f46
font_01_sfnt_off000146e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146E6 18900 bytes
SHA-256: c1582024872c17419481a1fab1fa7c870480e8b5b670075d932837803aabcbdc
font_03_sfnt_off0001a531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A531 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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