Malicious PDF — malware analysis report

Static analysis result for SHA-256 9170669264df2a44…

MALICIOUS

PDF

94.5 KB Created: 2021-07-05 05:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4b9c14cfa47d3dc9fe33e9efe177476c SHA-1: dc5c022e28c6fa258339a6d4e7b357339719bf86 SHA-256: 9170669264df2a442e7d57511621aaf6bcf86113386b6709dba83c407711bf61
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of numerous external links indicates the document's primary function is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://medvor.ru/uplcv?utm_term=despatch+meaning+in+shipping
    • http://duda-tech.pl/dudatech/upload/file/39646789210.pdf
    • https://implant-drill.com/userfiles/file/80207687513.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f55a3db75---2260414305.pdf
    • https://emprenderem.cl/files/97003461762.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/fd27580bf961026bdf27734c8d9b850a/nagum.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/f90f77bc81e380ab27fdcf80173c9bc8/40264451984.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/b36d54a9ce963c0a98944d0059f57b8f/95173484593.pdf
    • https://strechybenesov.cz/content/90676402767.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d09ba712fbff192ddd1f27c9d71588a2/mofuzaworiju.pdf
    • http://childconnect.com/swi/fckfiles//file/19219463327.pdf
    • http://provia-events.de/pics/fotos/1/file/71793648060.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3b013126d---88328028050.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16097c00c57cb9---zezelejosufapibiromit.pdf
    • https://nnkcreations.com/userfiles/file/47743703602.pdf
    • https://artbynela.com/uploads/file/10199285724.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607123f048f13---14839522452.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ca7d0baa1---96178738024.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6668a31cdd---marerutawegiwoveva.pdf
    • http://ristoranteibucanieri.it/userfiles/files/11693777088.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16083eebc723b3---gavof.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/rapofipigitulapiranudibe.pdf
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/a24a4cff434e55913df8ab94813103aa/xorisejipezipojifuto.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16096a4d21dc21---xezef.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea8c155121---54534165940.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
stream_004_off00011fc5.bin
11cd2828ecdf06bdb7a658e4e07810f345364ad3e9a13454351c429634fa2525
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11FC5 19056 bytes
font_00_sfnt_off0000efb9.bin
517cade06f42f53a085ad3f559987961525f8e6d548915ba72fb43a2cd89c3a4
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB9 10556 bytes
font_01_sfnt_off000107b4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107B4 16792 bytes
font_03_sfnt_off00013eab.bin
e15567bab68cba3ef68d19d07c000334326eae0fce1dbc4327cb4b346cf590b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x13EAB 17360 bytes