Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a00666e741b184…

MALICIOUS

PDF

83.2 KB Created: 2021-09-09 04:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0d81b457de1045ed1d7811f2f9781f20 SHA-1: a7b3a4ac3ffa7d9ec7cccca981e0e627ca8b2d71 SHA-256: f3a00666e741b184604d75fd30c3c8ee012de30bf4ba79f2dc85badc24271f14
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to link farms on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO abuse. The embedded JavaScript is likely used to facilitate the redirection or obfuscate the malicious links.

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
  • 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 http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613075c3838a0---47397673044.pdf In PDF document text
    • http://veterina-hrib.cz/user-uploads/files/12776055274.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/venaroka.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/14202558870.pdfIn PDF document text
    • http://terremeraude.com/userfiles/file/56273761701.pdfIn PDF document text
    • http://quartierdete.fr/uploads/fckeditor/file/mifesigerubabegamanefajax.pdfIn PDF document text
    • http://klawiatury-foliowe.pl/_data/file/12701563871.pdfIn PDF document text
    • http://sonarkella.com/userfiles/file/zekitupudid.pdfIn PDF document text
    • https://eric-parnes.shortex.com/ckfinder/userfiles/files/mopukujanew.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/641c8840930d3059747ac44b47aa7725/71653894398.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/xulenitorujoxubitadaj.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/34496604284.pdfIn PDF document text
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/gugekunajobedajib.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/files/15108726108.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/pugom.pdfIn PDF document text
    • https://futurefacesnyc.com/uploads/file/kowetuzumozelegizumux.pdfIn PDF document text
    • https://www.syria-report.com/sites/all/libraries/ckfinder/userfiles/files/xixulibiranemawogol.pdfIn PDF document text
    • http://hoya-system.com/uploads/files/202109020337477443.pdfIn PDF document text
    • http://vce34.ru/attachments/file/71492019888.pdfIn PDF document text
    • http://remont-m.com/userfiles/file/mirusakufawizidigevubetu.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/babotugukolafadivuri.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/76354519270.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/36826868155.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=chrome+close+current+tab+shortcutPDF link annotation
    • 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_off0000defb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFB 10676 bytes
SHA-256: fe8d520c0b66b3ce50ee178eb332f6e832c15a92ed8c3d14affb46ebe419e310
font_01_sfnt_off0000f75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6E 18524 bytes
SHA-256: d0e95e8fb23155952571f7efca267164ddfb2b4839e219e0889826461df7cebb

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