Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af2d7ff9bcc9742…

MALICIOUS

PDF

76.7 KB Created: 2021-09-18 11:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9f8edf92d203e8333d4cc1403c259cfb SHA-1: 1f68e33f5162622eaa1773209b3bd735faad5841 SHA-256: 9af2d7ff9bcc974281a60ce4d09dba4f049bd2a37087c32525a6bbc7764360a3
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a lure, directing users to download a password-protected archive, a common tactic to bypass gateway security. While no scripts were directly extracted, the PDF structure and associated URLs suggest it's part of a phishing campaign, likely involving a second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://email-database.info/userfiles/file/gopodubanejoxojofejivosud.pdf In PDF document text
    • http://wwstationery.com/files/file/lubewajazil.pdfIn PDF document text
    • http://camonetinternational.com/files/file/42355468035.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20210917_110097185E523E4E.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/wopilunawaw.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/50169822864.pdfIn PDF document text
    • https://signika.pl/Upload/file/33151388559.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/29961085742.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/sozenilasoruliwaga.pdfIn PDF document text
    • https://ladulceseguros.ar/noticias/fckeditor/file/76123743490.pdfIn PDF document text
    • http://www.hzkontejnery.cz/ckfinder/userfiles/files/zorofi.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210917183749.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613a75da06ea4---xadebefalaz.pdfIn PDF document text
    • http://s13cf5ef.alojamientovirtual.com/ropadefutbolbarata/userfiles/file/8020950476.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/jifukeramapu.pdfIn PDF document text
    • https://ladangmimpi2.com/contents/files/wazepoxixazepujufora.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/97110799002.pdfIn PDF document text
    • http://holzweiss.at/nazupagivorem.pdfIn PDF document text
    • http://karmakonnect.org/DrumiBhatt/karmakonnect.org/Final/ckeditorimage/files/71796474565.pdfIn PDF document text
    • http://phone-server.com/userfiles/file/liludeserorokunogafimuk.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210918_091801.pdfIn PDF document text
    • https://pastelbuilders.com/userfiles/file/16082069157.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=android+enterprise+intune+enrollmentPDF link annotation
    • https://unimedbelem.com.br/painel_template/assets/global/plugins/ckfinder/userfilesfiles/jigesotizipiwisokurag.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_off0000c996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC996 16800 bytes
SHA-256: a93596b4442def6f2bd635f64840762c42ed73e84ed14fa7dd326a7b95a5e10b
font_01_sfnt_off0000f566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF566 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7D 10472 bytes
SHA-256: 5d1d11370c00efde35f3466d6a158fa0e2620922f5759c4a7e5cc6fe67a5f28f