Malicious PDF — malware analysis report

Static analysis result for SHA-256 2747fb459d4c7101…

MALICIOUS

PDF

95.8 KB Created: 2021-07-17 17:29:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 566bed5eaa7c565f97dc616946714dea SHA-1: 121255eef768eeb973238a2981943d9ad83d8bc1 SHA-256: 2747fb459d4c7101e3e0f9275acc25e7bae5a2ffc9830060afd97b05c08dc35d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous compromised WordPress sites and other domains, suggesting an attempt to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing or malware delivery campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://palazzodiaz.com/userfiles/files/40484282492.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7d643900f7---72526238894.pdf
    • http://ibtaker.ps/userfiles/file/1806275348.pdf
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/e6c415e0939bc6fffb9b9f9f3dcb5c96/32865776184.pdf
    • http://argol-editions.fr/userfiles/file/rojebivopisag.pdf
    • https://holocaustresearch.pl/nowy/photo/file/mamoli.pdf
    • https://arerp.kr/data/file///vegabefozupi.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/ca2baa14b298ba3331ef6bf3727c7516/65529293131.pdf
    • https://mastirz.com/userfiles/files/jozuzekub.pdf
    • http://logistra.fr/ressource/site-image/files/66168869509.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160839ecfbea66---38624842144.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/573b77eba3c8ada230599cc57c033c8d/52284427371.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e9182c8a---46230086709.pdf
    • http://salon-urody-bellis.pl/images/file/xijifazikogerokow.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16088701096cbf---19947544930.pdf
    • http://jonkmp.nl/img/cms/file/nusonawupiw.pdf
    • https://kindeeyudee.com/ck_files/files/lekuxisobadubewop.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/s7uoc7v3edam602gc7am1ccd01/21795952109.pdf
    • https://agrimal.pl/userfiles/file/71025745105.pdf
    • http://orderkai.com/uploads/files/73318343471.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c9520a56a07---12982992974.pdf
    • https://blogsma.com/files/juwasaro.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=positive+thoughts+for+me
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001142b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1142B 16792 bytes
font_01_sfnt_off00012c42.bin
2b3822773207a480e461282a6925ec1c29969bd01d9fd6680ac525c9a235135e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C42 10516 bytes
font_02_sfnt_off00014449.bin
a231028e788b897881e2fac8a8dca27e271009ba55c84f40159e1ce52ce90db6
pdf-font-stream PDF embedded font (sfnt) at offset 0x14449 17104 bytes