Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab6c034a007c44f…

MALICIOUS

PDF

86.6 KB Created: 2021-06-30 03:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2b8b82752130410542f12737c84fc98a SHA-1: f51613010c768ff6d1d618125c5b0858c75eeea9 SHA-256: 6ab6c034a007c44f83d477fc0147181e898c0613533ae207282e56beef72044f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. The file functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, designed to redirect users to potentially harmful content. The presence of multiple external URIs and compromised upload links suggests an attempt to leverage these sites for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://drafthe.ru/uplcv?utm_term=northwind+heating+and+air
    • https://mariapolis.net/ckfinder/userfiles/files/49253389794.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791fa8a15ef---ruwuzutasuvi.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/85102a625abf8647cdfb4062530128ba/wapijapozipi.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/firarijujujupazuseniroba.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076f70ca2874---62716789517.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/a21db0b837156f8c73d835ebd20a02df/8447981389.pdf
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/30218999868.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8cf583f83---fetifipagagogupejimeg.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16096a579b5cef---59952492738.pdf
    • https://taevlingar.se/images/pages/file/3725286491.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160768a1bc700b---fimiv.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b7898cc48c2---zusebenexijexefa.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/d52cc74b6ca0e0af4d92c42e3222ccec/30742065645.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606cadeab021b---5675082120.pdf
    • http://zoltysnieg.pl/pliki_wyswig/files/3902283896.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783baedd927---zebemaxazumigipo.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/d90a5b8c9eaef3ea776a299a23517355/90297754515.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0207ca5266---benimapevon.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096597fd3e5a---bojukoseguxikivujimuwenam.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9159b37db---fibodova.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160d3b3e1e2893---85521448857.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/81v28lmgsdnmb3mobv6s8qh928/21987621185.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160afe459263cb---91466977545.pdf
    • https://vestol.bg/files/file/nodurewer.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_off0000f002.bin
4d4164ea9ce5cc8fd40a3a018005fb55d0a97c62c59b2f6300828edbc7e12c2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF002 10376 bytes
font_01_sfnt_off0001073d.bin
cdbd17064beaa5d0e289f2a470f741d23194be689b7539e462df95940296e70f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1073D 17016 bytes
font_02_sfnt_off000133a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133A0 16792 bytes

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