Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d10a8f40fb567c…

MALICIOUS

PDF

79.7 KB Created: 2021-09-17 13:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 87cfd91cf484ea8364081064170d837f SHA-1: 9afbed0086c7b7674e5dc96a57c426c5dd89bc1b SHA-256: 67d10a8f40fb567cda58bc0b1a5652abca32d0fa3ea632169257abe44ca366e6
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to disposable domains. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document is designed to trick users into downloading a password-protected archive, a common tactic for evading gateway security. The ML classifier also strongly suggests malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://kompassztuki.pl/Image/files/8283375689.pdf In PDF document text
    • http://stimatacasa.eu/userfiles/files/kanarinumodir.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/febemokoraxo.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/1480025930.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/80190653468.pdfIn PDF document text
    • http://medtravel.lv/images/hand_uploaded/files/juvabaxozen.pdfIn PDF document text
    • http://strandedtattoo.net/file/60768606894.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/68053668598.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/zepawuluvafemivuzoru.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/68b6dcada486c9fb288ff96850651893/xodesawumuni.pdfIn PDF document text
    • https://reha.bg/content/upload/file/18100956496.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/seresoluwik.pdfIn PDF document text
    • http://wacommerce.net/home/integrity/public_html/ckfinder/userfiles/files/nifidizewo.pdfIn PDF document text
    • http://musicfriend.vn/public/default/ckeditor/files/53945190513.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/32064287613.pdfIn PDF document text
    • http://gymostrov.eu/gymostrov/userfiles/file/jerutadowavunafonodiri.pdfIn PDF document text
    • http://dichvutot99.com/webroot/img/files/defuxuri.pdfIn PDF document text
    • http://a899.net/userfiles/file/laxuzogifaponuruzazolara.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/xiwurebiwaxakimataluja.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161343d91bcb01---16749051621.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/54011258361.pdfIn PDF document text
    • http://farmandari-sarvestan.ir/images/news/files/12292394218.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/zuwaroseropisubobefotopi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=www+wapdam+com+appPDF 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_off0000d644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD644 10016 bytes
SHA-256: 6be2383a21112746d56793d1bbf148f59a63680c45277d69bdd68875522e1821
font_01_sfnt_off0000ec80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10492 17288 bytes
SHA-256: a74d912fd325e296026b3e0d337cc478f190f982c2cf218ba1cfa5e69e067c56