Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be2b18467e996d5…

MALICIOUS

PDF

74.4 KB Created: 2021-07-15 22:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5c50bea4b1def7c694214c330a14d870 SHA-1: fcd533a680581f3c25d4f54a1d90181baf6489f1 SHA-256: 7be2b18467e996d581f4dc564a8378a62ac6987ce92ffb7255adc0e192e69026
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is unreadable, but the heuristics and URLs clearly indicate a malicious link farm pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://mygiftltd.com/userfiles/file/92428106860.pdf
    • http://hopkinshigh1988.com/clients/75739/File/56152003995.pdf
    • http://fontanarosaserigrafia.it/userfiles/file/jakidomagom.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609a03a1278e4---diralodetetegupa.pdf
    • http://wisdomtours.net/upload/file/wilarifimiworudipagevamu.pdf
    • http://arniestribu.com/campannas/file/64288208763.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2183a4c70---45786657754.pdf
    • https://angkorphotographyguide.com/userfiles/file/dezeda.pdf
    • http://ristoranteibucanieri.it/userfiles/files/fotobabom.pdf
    • http://otvorene-srdce.sk/userfiles/file/34518796197.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/pqtgs490stl97lm39q8mpdeo3l/8744719396.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c671c999a7b---xosubirudodivoxurejimemif.pdf
    • https://khabul.mn/mmpa/userfiles/files/83019940187.pdf
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/deedf79d5g33g8c95unr02h8v3/582655041.pdf
    • http://shannonlakeestates.org/fck_images/file/fejosadigurob.pdf
    • http://hasici-pristroje-eshop.cz/files/file/39457376407.pdf
    • http://cerescommoditiesltd.com/Images_upload/files/97199150890.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b089031e33e---sizimoliva.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/3b209a3db05a2c95019508a76800e83c/26586870779.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c56782c3e66---66437824828.pdf
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/r4j0orv359qn9uu1jg9j2mfkfd/84502372574.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609db9ced6ebf---gugazamavuwifupapasuw.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eba62b35b5---mamavomuzelumefenep.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=who+vs+whom+practice+worksheet+with+answers
    • 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_off0000bff4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF4 16792 bytes
font_01_sfnt_off0000d806.bin
d4d9f5acb4e2f8cd9a7261217548e343e7e9564f5de48d21edfcc5cf9b0d22a5
pdf-font-stream PDF embedded font (sfnt) at offset 0xD806 16676 bytes
font_02_sfnt_off0001034d.bin
8a3a03850c2a3d954328b1291c2122b93e0a84bbabc475aea4809368e11ad77b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1034D 10832 bytes