Malicious PDF — malware analysis report

Static analysis result for SHA-256 c464022bde7503ee…

MALICIOUS

PDF

86.5 KB Created: 2021-07-05 13:34:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5cd9781f4f28f16af8f4a39156c6b59f SHA-1: a2ac5b8017a6de1d9dcef5e574bd729bd66392a6 SHA-256: c464022bde7503ee04098a7cc4ac14959ba5a24859b81fe9a0a3a0e03d86a485
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/ictu8f99d5q8nkf95n54bdj876/42972661612.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/s7ovus26kihkmsr1321tsiua75/wikepotusigujujuwowegi.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d3eab36ec---kawopekokitulo.pdf
    • http://sunnysolutions.it/uploads/assets/file/60509231750.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/cb0b031a1e3a5b746b3a6bd9c220b149/vudadifepesulubafe.pdf
    • http://hutbephottaihaiphong24h.com/upload/files/21523537870.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/b8dd981e685ad6e2eea294c3be92adab/wizivabi.pdf
    • https://bataretak.com/img/files/file/jurazodozorajozirasoje.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/710aedb88a3f74bb7060cc4bd68cd800/25386794967.pdf
    • http://hjtech.org/admin/upfile/file/mupitavojizopijukawesoju.pdf
    • http://theemasternetworker.com/ckfinder/userfiles/files/84620790849.pdf
    • https://abe-rdc.com/userfiles/file/pozapenubegafimamun.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/e1d5e80275e0ef133ade423819b57e3c/77007747770.pdf
    • http://itemclinicchina.com/ckupload/files/88065931995.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/d5kthfnitm65kilug550injpo1/13816792447.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/02c3ed03eb740f03ff25232333193690/66110906893.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/8a48a6faa3a3485b0a0eaf5970d057f0/23197745328.pdf
    • http://kaowei.tw/image/files/20210603_165354.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/nkmnqlloiult6ll09s86l1mte1/raximavudedivigi.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/9u258lo9vnt83do95204lns9e8/76519680719.pdf
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/10076032201.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607227169e034---niwiloseradexowuka.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab3881ffa4---79679772301.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/94126fb685562c6232ecbb99d8881d8a/63078407382.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/475411da3c268313737eaf4bc5addd77/25680217428.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=des+in+cryptography+and+network+security
    • 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_off0000ec1d.bin
68c0932ff7c72ed2795cad2ef391fc2b17503f051918529676c28492647c4042
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1D 17824 bytes
font_01_sfnt_off00011a79.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A79 16792 bytes
font_02_sfnt_off00013290.bin
b4a09509eba002422923a1daea7208055e2b812c8311e44f51e270dda76b9672
pdf-font-stream PDF embedded font (sfnt) at offset 0x13290 11140 bytes