Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc72491515f3669…

MALICIOUS

PDF

93.6 KB Created: 2021-09-20 11:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f663aa87759828748b6bfba9f80479bf SHA-1: ec98302bfe7c50b97b48d56f88117515dd16872b SHA-256: 8cc72491515f36694c688065ebb7ddd316416a973489394336a621fe447e7e33
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=10+band+equalizer+app PDF link annotation
    • http://art-lan.ru/uploads/assets/file/tigepetumo.pdfIn PDF document text
    • http://thegioichuyendong.info/app/webroot/upload/files/tanoxofabikimezik.pdfIn PDF document text
    • https://cantarefides.ro/admin/userfiles/file/wowagibulexagebibel.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/vudif.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/mabeboni.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/161463f2175c4c---59776875310.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/benowivefosif.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/zejoru.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/padufivejivexurivarukelux.pdfIn PDF document text
    • https://ice-group.pl/userfiles/file/firojazukenabu.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/josusawo.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16145affb6570d---zivopelekurasefuduzovov.pdfIn PDF document text
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/gazosukagovugufuvegu.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/4c8c2627ad0ac5cb7c12fc4411639c0d/1508344087.pdfIn PDF document text
    • http://dienvietbac.com/uploads/files/zofolikupozedexupoweko.pdfIn PDF document text
    • https://ezsprinting.com/userfiles/file/sijukenonosivu.pdfIn PDF document text
    • http://rentator.com/uploades/fckeditorfile/13742407813.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/borosapaxemovimifexodoso.pdfIn PDF document text
    • https://wintechindia.in/ckfinder/userfiles/files/viberaborojisu.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613baa5a92859---51561387619.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/lexefurogenelotereweg.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/92612641006.pdfIn PDF document text
    • http://demirlermetal.com/resimler/files/19790186720.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/19261134186.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001076a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076A 10524 bytes
SHA-256: 116783b4421100a034e83d0ebef2b72cbb295e6b4f6cadef0504fa08eae49c53
font_01_sfnt_off00011ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF9 19616 bytes
SHA-256: 1f63dac75a62922d06214c3914ac3b7bf721cf849735e1d6f52d2b87b24683c8
font_02_sfnt_off000150af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.