Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff95ec6f2fe8ddf2…

MALICIOUS

PDF

69.1 KB Created: 2021-09-24 19:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b1ef713ea8c711818be500cc7675529b SHA-1: d5cf7b18253e45d2caf729ae81b73c6af9bf09b8 SHA-256: ff95ec6f2fe8ddf206da278bb1de4e2e6cd14459a384cdc275d12df782a3a6fa
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and multiple external URIs, including one pointing to a game download, suggesting an attempt to trick the user into clicking a malicious link. The document's structure and content align with a phishing attack designed to deliver a payload or redirect to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 8

  • 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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://queure.ru/uplcv?utm_term=download+game+playboy+the+mansion+android PDF link annotation
    • https://nazrabilisim.com/calisma2/files/uploads/62217203294.pdfIn PDF document text
    • https://aluvioneschicamocha.sinecsas.com/ckfinder/userfiles/files/68752138723.pdfIn PDF document text
    • http://abworder.com/uploads/files/6294856085.pdfIn PDF document text
    • http://yongqingtech.com/d/files/gobudadibaxefafiremabobig.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/tutafoganisuxadiruje.pdfIn PDF document text
    • http://myphamvickwhitebeck.vn/luutru/files/1138379006.pdfIn PDF document text
    • http://qdjshg.com/files/file/tokejigomojakir.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613675b99f9b0---14481266752.pdfIn PDF document text
    • http://putzlappenborner.at/editor_up/32220281565.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/putanomonefojosuni.pdfIn PDF document text
    • http://khachsansapa.vn/webroot/img/files/texexej.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/10042973201.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/37127938635.pdfIn PDF document text
    • http://ukonlinedirect.com/userfiles/files/navivikipebokuk.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138830ce5e59---nagovudidivuzovabuji.pdfIn PDF document text
    • http://hoaiduc.edu.vn/ckfinder/userfiles/files/19586842241.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/80204068459.pdfIn PDF document text
    • http://tianlanlawyer.com/filespath/files/20210917033306.pdfIn PDF document text
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/27279317324.pdfIn PDF document text
    • http://hongdacable.com/d/files/86669624961.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/8600247411.pdfIn PDF document text
    • http://usairsprings.com/userfiles/file/zepumigiravifuwozub.pdfIn PDF document text
    • http://chrisdepanneservices.com/Sites/cds/files/bikozixelibazeze.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_off0000b1e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1E6 11180 bytes
SHA-256: 026aed48ab803762739c9bfabbf59227350e07e4099e420f6f1a6727eb3d113e
font_01_sfnt_off0000cb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE389 14152 bytes
SHA-256: 1e9e33e1322256d18716afcdb965b0e63d8a1b955a9afd280efeb92bc62f67f4