Malicious PDF — malware analysis report

Static analysis result for SHA-256 189c5c08547fb507…

MALICIOUS

PDF

87.3 KB Created: 2021-06-28 00:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9da8530f206ea828a00e5c75487b5551 SHA-1: 40d4bf185ab7052d60ad00c2d1b66dc31b1d1526 SHA-256: 189c5c08547fb5076fdc4690117a09a7bbcf6b804d11d35bf54ec8b85d6c317a
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/a2deat64qq65808n9utug094j0/90112288070.pdf
    • http://kidneytracker.com/ckfinder/userfiles/files/foriwezavapevopukudij.pdf
    • http://kccmaul.com/files/files/luwagulatulazituzi.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16095da09624d8---12359939284.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080694d14754---dovimubiwalubawe.pdf
    • https://asi-filter.pl/files/file/sorafedozapusefaderuk.pdf
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/850dd247ba1b711b25888b7a13c3ba8d/liruwowane.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16077100242f2c---49161197799.pdf
    • http://kaushalacademy.org/ckfinder/userfiles/files/rufowedagapefo.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/eq7vobnqsifnrvc3rflnor0lfo/boguvesabijaputawu.pdf
    • https://alnahamgroup.com/userfiles/file/50620306709.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/3al2rjhsq5fsdq4rdkkmpd95ue/93744431992.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4940d0492c---dutizokurin.pdf
    • http://janandpoos.com/clients/872640/File/dewutapixopuso.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16074dc2449ab1---latugalenigobojulogi.pdf
    • http://vaness-sens.fr/ckfinder/userfiles/files/37664932916.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/lc007718indttkns3brprff5bg/99845481292.pdf
    • http://brukbet.com/user_images/file/nanami.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c564c298777---terojikivuli.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/089dd67b35de5ab8695bf90e7f572f3c/wikomoxowumipuwekodese.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/e76fdabcff035ff4f1cc25cb5af5a3b6/70204957234.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=latest+tamil+movie+download+website
    • 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_off0000f5b0.bin
2b18c36bb804431d49865b6362921028d0d0a82a43280d7d96a7a1eb02fdd73d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B0 16272 bytes
font_01_sfnt_off00011fd1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD1 16792 bytes
font_02_sfnt_off000137e8.bin
93e7b738ec32fca5deae4fa4416ac6015bd3aa6c617dfdb0a395bb541bbf673c
pdf-font-stream PDF embedded font (sfnt) at offset 0x137E8 10560 bytes