Malicious PDF — malware analysis report

Static analysis result for SHA-256 114ec139cdf2467e…

MALICIOUS

PDF

67.5 KB Created: 2021-09-09 00:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 6b98047de25c98e97d439b57e22bef97 SHA-1: c8de41181a88d43e8a0262e565237246cf4962cf SHA-256: 114ec139cdf2467eadb8cdaf55e28eb59a651fecf9899b1539fb5d2bae73f31e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, indicating a likely attempt to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly suggest malicious intent, consistent with phishing or malware distribution. The presence of a link farm heuristic further supports the classification as a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://oldadmin.k12cart.com/media/files/47280726146.pdf In PDF document text
    • http://tsutae-f.com/js/upload/files/fidewapez.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/neposowota.pdfIn PDF document text
    • http://presssimayeshahr.ir/pic/file/6405285495.pdfIn PDF document text
    • https://mcdelandes.ca/uploads/file/76329718498.pdfIn PDF document text
    • http://full814.com/upload/files/lebovuwarolekarikoga.pdfIn PDF document text
    • https://isigakizima.net/img/tmp/file/sukogeduberuvim.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/jitoze.pdfIn PDF document text
    • https://chingchia.com/uploads/files/202109080406527046.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16135fc96c2129---gufufis.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/44072996808.pdfIn PDF document text
    • https://sharedsynergy.com/userfiles/file/96521889850.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/161362c893d930---rebamedub.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021090812423773499.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/ferifulagu.pdfIn PDF document text
    • http://kirche-treuen.de/UserFiles/File/vizetupofiso.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/72268049986.pdfIn PDF document text
    • http://austria-ex.com/images/blog/file/jibisutonomodikuloxisi.pdfIn PDF document text
    • http://twapp.freshkon.com/upload/files/6771120177.pdfIn PDF document text
    • http://optimaglobal.net/ckupload/files/ziboxizavaguwagigamedu.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139272e08a93---radow.pdfPDF link annotation
    • https://falconshipping-uae.com/userfiles/files/wewenedavezenodutesuzun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=flashlight+call+and+sms+app+downloadPDF 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_off0000ac36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC448 14392 bytes
SHA-256: f23ee7cf7581b7acc725e2c158edcd5c8f69296982733d3083120cab6b049424
font_02_sfnt_off0000e86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86E 10792 bytes
SHA-256: 913bdda256071375b84b3ee861676c02564438d15b859bb6e049c9f4546dd0cf