Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcb12a6a59cec95f…

MALICIOUS

PDF

261.4 KB Created: 2021-07-24 06:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 55a3de19b5cff133f028e6b876154438 SHA-1: efdba0cd4e9e7146e6ad20f1266ddcbe6587cb43 SHA-256: bcb12a6a59cec95f83af7d626b1fbbb5a4e5150262eb03b81d77c73e86234bf3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to distribute further malicious content. While no scripts were explicitly extracted, the presence of external links and the nature of the detection suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8956

Heuristics 5

  • 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.
  • 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://cowichanmusicfestival.com/userfiles/file/gupiz.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/fffad099164edb45e3c337f13187f4e6/69854721409.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8511f124d0---82479308346.pdf
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/20199333408.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cf6ee4262cc---87549433687.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094d339ecbdc---90116566713.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/5mk55nbgmq7k7fpoe1jvcj4ha2/7788963964.pdf
    • http://mebco.ru/images/file/13268280137.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5ab343a7e---gowibawopobumozison.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160fb29c1e98f1---28013100649.pdf
    • https://aviatroglo.fr/IMG/file/gebivugixujamexajibupad.pdf
    • http://gianniarnaudo.com/userfiles/files/xizabimubukovozisu.pdf
    • http://colorfulmedia.de/fotki/fotki/file/bukoxanunizuzefog.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/b824ded77daee0ced4593ee5453b9d2d/85878787069.pdf
    • https://atamergranit.com/userfiles/file/42803236573.pdf
    • http://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/93575943047.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf6e554b6c---feberive.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609603dd199d6---jebifobuxulelezejeluvo.pdf
    • https://acronimocostanzo.com/userfiles/file/43552426260.pdf
    • http://dragonera.cn/admin/userfiles/file/gofeburik.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5eecd02202---59810913501.pdf
    • https://tcremich.lu/files/files/51292308367.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/dh196iekv5s7289vabb5tiued0/11906004560.pdf
    • http://dancedynamicsla.com/clients/38740/File/96232228199.pdf
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606fffdf79371---16412604014.pdf
    • http://altaprecision.com/userfiles/file/wejoxebigamu.pdf
    • https://miaousland.fr/ckfinder/userfiles/files/wiwagirovixamugiliwabivib.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=cisco+attendant+console+advanced+12+installation+guide
    • 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_off0003a541.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x3A541 16792 bytes
font_01_sfnt_off0003bd58.bin
177584c564fad0a6ea383bc08d2b7c8ee39759cf70e7cab6a736d8205a0ff739
pdf-font-stream PDF embedded font (sfnt) at offset 0x3BD58 10816 bytes
font_02_sfnt_off0003d65a.bin
6301a48bda476a6e9bcd42068c21f1f3c996ef0af69e8de524418c609028061a
pdf-font-stream PDF embedded font (sfnt) at offset 0x3D65A 17892 bytes