Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5459c708fa0152…

MALICIOUS

PDF

84.1 KB Created: 2021-09-03 05:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c20746a402429b934cac6180e574ba18 SHA-1: 48b61e5b4c4e653197e40c2eed86e2a8ee6ee820 SHA-256: 0e5459c708fa01525e5fadae0d375065b50ccfaebd53b3354fc05b7852137574
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 phishing or malware distribution intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely serving as a distribution point for further malicious content. The presence of multiple external URIs and link farm heuristics strongly suggests a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://coretry.ru/uplcv?utm_term=cultivo+de+tomate+hidroponico+pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/rtm1p37sjfqkb21rjj0iu2lsas/87803717717.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/0f208a38a113252789f72c2140411b0a/nopuzorubonejorasatalil.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccab7b5fe2---58712024280.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/msqolkelgnpgima5ltvooqfenq/80448075110.pdf
    • http://sbstroy53.ru/img/files/21244922384.pdf
    • http://gps-tw.com/CKEdit/upload/files/zamopetowedijazumabi.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/s1riko29bgmga1eas0l900eclf/13229335136.pdf
    • http://trivio.it/userfiles/files/58085592780.pdf
    • http://jubileejec.com/userfiles/files/78121740472.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd88d0b016---zikesapadik.pdf
    • https://doktor-ara.com/userfiles/files/feguxakafu.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/ea0d36edf414d52fc8519a0caa6ece16/jopelijelutefagogivebu.pdf
    • http://autoshiftbid.com/fckeditor/userfiles/file/14746004463.pdf
    • http://accu-chek-event.com/ckupload/files/luxoredelepawepot.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/64b1fed9570864037e12b02ce5909fd0/kukowugizakiwapejur.pdf
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/28vks100np5r633g5c9l2c8ag1/furivimosusojudu.pdf
    • http://anvlaw.com/userfiles/file/gutewijuzosadukiv.pdf
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/jenizikudepixutigepuwar.pdf
    • https://www.utn.ac.cr/sites/default/files/files/14995576079.pdf
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/o0qur430nnv6ucubnvbvnmutt2/27636435744.pdf
    • http://unityproductions.com/upload/files/21631194803.pdf
    • http://27derajat.com/assets/ckfinder/core/connector/php/uploads/files/nojiwek.pdf
    • http://longthinhphat.net/uploads/files/jipoduzelizufaje.pdf
    • 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_off0000e1e7.bin
6965c86de688a2638f8f704b194eb123bf2ee1bbf1bf05c5d1b159724e0a473b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E7 18664 bytes
font_01_sfnt_off00011182.bin
276113c20b5471f270f0d92df52497192ea21eb98e5c74d05286933b8a9cf122
pdf-font-stream PDF embedded font (sfnt) at offset 0x11182 10912 bytes
font_02_sfnt_off00012aa0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA0 16792 bytes