Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba6ec0abbdd8e9b1…

MALICIOUS

PDF

101.9 KB Created: 2021-06-27 04:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a711c1bb0a3b4c9403ff61bbda86311d SHA-1: 3016cee719f2db75fc76dad51edf78cd3cdda460 SHA-256: ba6ec0abbdd8e9b18a32dec1998ccfdbe2d8d7dd09ddf7166ee01186696dfc8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and link farm patterns, indicating a likely phishing or SEO manipulation attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, with the file being identified as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=how+to+get+lifestyle+points+on+sims+freeplay+fast
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918487a5a25---14690949623.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/8c5ce49cda3a6a7c42c90308fdc8de67/71541644347.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc99c4e689---gorubum.pdf
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2d975b529---kofidoxakoweja.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/8llgt90vvvelsofno9h7326js3/53007796550.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/o5hnshpde179r1mapl34bibod0/wababurerekativoxasejemek.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/t8de1elcjkbutef7361ehoes77/16669047328.pdf
    • http://hungbuloon.com/media/ftp/file/20344242014.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071754d8c4aa---defedidozuzivivalozurak.pdf
    • http://emke.hu/uploads/ckfinder/userfiles/files/87831076160.pdf
    • https://zzarosiscarampola.it/file/liripinorojiribelopomekix.pdf
    • https://fibaquitaine.fr/cebatrama/userfiles/files/lefelopisuvigojudinewu.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/6b25bf0ea3c6fc38ce30e369c43194c2/39493218720.pdf
    • http://aucoindeshalles.fr/menu/file/gamexejufaxiroboruzatomu.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b05c5bc18---fudevepisodudazix.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/3419e4ba45bf6fa5d731e6aab89bb5d7/wotupalibajumo.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b40c3918f---godovexisopupujepev.pdf
    • https://all-stage-meditation.tw/uploads/files/60b9d605ee01c.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/c029c058e2eba16d85585919341f3d6e/rutuselugupanom.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/1cd03ef31d62d9bd23e898fb604fc2be/kuvusuti.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/dd9087515771c2ec3e4a53e2d61fb148/jolonokokirufukorovebizo.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/l5fgggi0vp426ks3m2iof21fhr/1776922172.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160745325ba6a7---36230185908.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/45c2d3b80b2d62ba96ba5d09b03644be/rosudarab.pdf
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/53fc89cc389853a649b5335dfbf891e7/78677291119.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114da.bin
cfef6d7408ccf03c7f9ce1324a8f9d2cbe8a701a095383d3e142c6ef2921959f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114DA 17300 bytes
font_01_sfnt_off000141b5.bin
23191a20989a09959b2cbcbcedb805b598ca26499a9d836ac043174a76a4ddba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141B5 16428 bytes
font_02_sfnt_off00015813.bin
835d5609b92b19e5ea92ee94635b217a87e525e533cb846265fa743f0d950e61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15813 10892 bytes
font_03_sfnt_off0001714c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1714C 16792 bytes

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