Malicious PDF — malware analysis report

Static analysis result for SHA-256 2edf2d3b7f1f7680…

MALICIOUS

PDF

91.9 KB Created: 2021-07-18 21:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 13ab40cb71cb980c4ef8a5738cabdc85 SHA-1: 8ca7cac22bdef460412b4af63339b08b3ff4b495 SHA-256: 2edf2d3b7f1f76802ecb17b88ac6a612ab0ec9ff0562c633dcb0bb02219b7e44
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. Although no scripts were explicitly extracted, the nature of the URLs and the heuristic firings indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://terracetemayonetim.com/upload/ckfinder/files/45853315484.pdf In PDF document text
    • http://espressoperfetto.nl/app/webroot/files/userfiles/files/rimasozetifakupanagoxufa.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/gupegazuvepi.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/e4a580dc3fa166660e4c2dee431e511b/64073204558.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c240d2334---12397544625.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/aa0eee4d599bf6c9f964609a3eb9b979/febogonivipejerunavibu.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/nosafusanipululomipob.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/t1r7vs0th0okt1rn96mr1qm9jj/73813342128.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202106181406092940.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607219504ee50---nunovagexogujoviloz.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/78898652589.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/dobijobopuzizizab.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f16cab5fab---63726844517.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/40885629733.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8db65c66ed---rikipedepik.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/xolarev.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/i8rne3jtsu33n6une8qidkn4fi/62331109564.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/9a590328144e3171d0152fd25aa47f67/88342723333.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160734b0b6a6c0---10842592529.pdfIn PDF document text
    • http://savalis.ru/userfiles/file/91371296609.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/jeziluvupakomumij.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/fe08e17d0823e62064fbcaed2cb0a7f7/82038979532.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/98a177f1c151811dc8405d3f122e8dac/vuwobixo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=morning+love+message+to+my+husbandPDF 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_off0001037e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037E 11108 bytes
SHA-256: 1b9d53f6091ef86ce61b5057a8e67242c36859d7efc390907d420166401c747e
font_01_sfnt_off00011d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D09 16840 bytes
SHA-256: 62ddf2de1d90f4025bd030b53a3bb821b8fbae03c893b6d47c9fc3b5dda87a76
font_02_sfnt_off0001486f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1486F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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