Malicious PDF — malware analysis report

Static analysis result for SHA-256 36dfb274c392e6bb…

MALICIOUS

PDF

70.6 KB Created: 2021-01-30 03:09:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: cae4f028934227e9e578f92d955374fc SHA-1: d1f68c668c51f3e51096f1f62a20c4de8268eadc SHA-256: 36dfb274c392e6bb39bb35de5f0d3023d613c00f7baaa9bdcfba756a52a98216
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document body, though heavily obfuscated, contains references to a 'Suzuki DRZ400 workshop manual' and is associated with numerous URLs, many of which are hosted on disposable domains or link farms, indicating a phishing or malware distribution attempt. The presence of embedded URIs suggests the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jacksth.ru/123?utm_term=suzuki+drz400+workshop+manual PDF link annotation
    • https://cdn.sqhk.co/sixojifez/Xm3ziJC/swat_and_zombies_season_2_dna.pdfIn PDF document text
    • http://lifeit.pro/towuzibosalekolixek75efq.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/khichct/nail_art_kit_for_11_year_old.pdfIn PDF document text
    • http://geleostone.online/asm_aluminum_and_aluminum_alloysksrn2.pdfIn PDF document text
    • https://cdn.sqhk.co/luwiwaduna/gieAhc5/durak_online_gold_hack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422914/normal_600e846f6e4d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420905/normal_600d696576d75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388841/normal_5ff42db64fcd9.pdfIn PDF document text
    • https://cdn.sqhk.co/waboperunut/S9jahiw/88790406813.pdfIn PDF document text
    • http://tophomework.space/vowireluxblwy7.pdfIn PDF document text
    • http://fakts.design/pezinesuo51jh.pdfIn PDF document text
    • http://idealica-ordina.site/free_online_movies_2020_apk_downloadujzs1.pdfIn PDF document text
    • https://cdn.sqhk.co/nomazotesi/heDih8P/game_center_apk_download_android.pdfIn PDF document text
    • http://jakor.pro/jopiwolunukamapaxosd7ryi.pdfIn PDF document text
    • http://xazivigufimu.22web.org/minecraft_bedrock_edition_free_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/WWBO7e5/paul_hardcastle_19_music_video.pdfIn PDF document text
    • http://55571.ru/sd_formatter_v4.0lpav6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462775/normal_5fc804ac6421d.pdfIn PDF document text
    • https://cdn.sqhk.co/seworani/g3jdZkk/82571895881.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nujowizuwumug.rf.gd/70281897300.pdfIn PDF document text
    • http://sixosotonipo.epizy.com/voxetanirok.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53B 5736 bytes
SHA-256: 648cd175c63def08678bee2e404f64b135d89465a9bcdfca4e87f0ea9a48f6dd
font_01_sfnt_off0000e8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B8 10664 bytes
SHA-256: 9b1addcc8ba08e30a06a4c537b16ef76e6dbf448bf4d684599292646eda6da24

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