Malicious PDF — malware analysis report

Static analysis result for SHA-256 6baa82e6f24c561c…

MALICIOUS

PDF

108.1 KB Created: 2021-06-27 13:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 15926ff878a9a7a90156d86fe68dc504 SHA-1: 574fff99e20506330348db653fb6e83f0a6fbae6 SHA-256: 6baa82e6f24c561c5b44c9498e0f572276806faa5d7f030c4c066e53f6ea4d44
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to external resources, many of which are hosted on compromised or disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1a571528a---filamovewororor.pdf
    • https://emmaushuis.org/pages/8819885115.pdf
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/34585847387.pdf
    • http://assushop.com/userfiles/assushop.com/file/60092858150.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/gbd4hqeh2jp6bgneju747oe27k/givonalekowes.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c6d79638a---677280601.pdf
    • http://chithanhplastics.com/uploads/userfiles/file/21686327241.pdf
    • http://designbeginnings.com/upload/file/2962151187.pdf
    • https://cualuoihoanmy.com/uploads/userfiles/file/72982572972.pdf
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/31653268427.pdf
    • http://profesniprukaz.cz/ckfinder/userfiles/files/fuwawevofanilifexeja.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/9m9t46g102m9o3ku7j5didl5hn/49280947274.pdf
    • http://dok-vo.ru/userfiles/file/midogo.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/448595ded450e88ca735fd804087ab99/39400602723.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d074e6966ae---xisegupuguralikefapeja.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab38829de88---vazubagugeniborimabes.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787083c7a50---sekipofokovis.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/vs3uflqllekq4iamqpdqok2tpc/77743179190.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/a3ed315e7ff4056ee24f564b8869f4e4/14088297026.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607163b410102---tufuvexovixabugof.pdf
    • http://rittenhousereunion.com/clients/a/ad/ad7d26974070b67854a29702aed78614/File/kaxasupo.pdf
    • http://oreade-breche.fr/userfiles/file/33173012320.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=to+those+it+may+concern
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc92.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC92 16792 bytes
font_01_sfnt_off000114a9.bin
c2187656bf21520e2cb6aa259404356f93ac35e4d120aa64c10e9516469298f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x114A9 10524 bytes
font_02_sfnt_off00012c82.bin
da996f1e5d0939787f9eb1bda1712083bd2d53b519ac8306c80530eab604d5c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C82 17148 bytes
font_03_sfnt_off00015997.bin
1957ce1a3024ff7e91c3ade1c29b210ba1a3e249d05999047d09451042e943a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x15997 25008 bytes