Malicious PDF — malware analysis report

Static analysis result for SHA-256 d60c1f6fa22ce029…

MALICIOUS

PDF

75.8 KB Created: 2021-08-27 22:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2ef0e32839ccd60bf164dd19bc9f0ed7 SHA-1: 1fab9a8d293eab47e805321074b6bfe5732082f5 SHA-256: d60c1f6fa22ce02945cc1ad71e3c78e97e3646003c5a2bb9858fcc64e0a7a62d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other domains, likely intended to lure users to malicious content. The presence of multiple external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/mrl0h0js7nj0ealg45l1kia2jh/1504949100.pdf In PDF document text
    • http://didula.com/img/file/safifapakajovozor.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/vojowotudivinafuxukixiv.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/dejogup.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/lipusononifaxakajezagu.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/8b8e470d0349e2155cd11865de77cac7/84839169192.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/968b5b1gjj1jq62jb498qto2gf/zafam.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/jaziduli.pdfIn PDF document text
    • http://life-worldwide.org/assets/uploads/files/780630021.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9f9a4a2cd---59488200321.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f29d5ebab8---kakiziravinokiseto.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/161061ba93c7e7---95922145326.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/da9d8376f0897865d9e54fe106329233/paraxavetunuvoruxosoware.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113bb8187f8f---wojevolapodajovuvolezava.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/21094012927.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/lozevasin.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/dd2275309f64403f3dc47b3eae1df26e/48157397145.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a8af62991---92475260712.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/96795719967.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/0e22941af602d13d192a22bdb16e7734/warokopuvi.pdfIn PDF document text
    • http://thomasbelldescendants.com/clients/40432/File/16186812813.pdfIn PDF document text
    • https://maychieuvinh.vn/upload/files/26415650737.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c93047e22---81525566167.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=her+wish+is+my+commandPDF 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_off0000c740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC740 10684 bytes
SHA-256: e56433bb12e396dfa7bcbebf94787fcaf1d6d6f528e3d1e0d74d169b0202f537
font_01_sfnt_off0000df9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9C 16172 bytes
SHA-256: 9f56bb89a99cf664eafe99942d870a7a638c3f757bdd1d5b2f87bd0e1d18b148
font_02_sfnt_off0001093b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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