Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa5db7d4e5f4e4e4…

MALICIOUS

PDF

81.6 KB Created: 2021-02-20 17:44:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bee2681cecc1f55ab6afed7be3239acb SHA-1: bca51ac1d1596cf0a2f2fabfe5f724dda6f11914 SHA-256: aa5db7d4e5f4e4e463c095846ef338a611f2a25fcf26946f7e50afb4c21227e1
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to lure the user into a phishing or malware download site. The document body, though heavily obfuscated, suggests a lure related to 'gaiter style mask'. No scripts were extracted, but the presence of external URIs and the overall malicious verdict indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/wix?keyword=gaiter+style+mask
    • http://anrostore.ru/18722455206rahhy.pdf
    • https://manomukujoputu.weebly.com/uploads/1/3/4/5/134517900/9c7d959e4d95b17.pdf
    • https://jutosavaneje.weebly.com/uploads/1/3/2/6/132696077/wujilufen-kafuvoga-nodolapadow-niwobif.pdf
    • https://suterigegopos.weebly.com/uploads/1/3/2/6/132695321/xarinodun.pdf
    • http://lisifakus.66ghz.com/20809917571.pdf
    • http://helplnstagramoffice.com/video_live_wallpaper_download_appw23rr.pdf
    • http://maporirunigis.22web.org/4548592426.pdf
    • http://walletelectrum.buzz/bloons_td_5_monkey_lane_impoppable_guide95nik.pdf
    • https://jifalutisapore.weebly.com/uploads/1/3/4/7/134772579/6343241.pdf
    • https://resawipodejevi.weebly.com/uploads/1/3/0/8/130814711/8216700.pdf
    • http://retys.fun/duvuvewowatudazamo35c7c.pdf
    • https://fazafunapogaz.weebly.com/uploads/1/3/4/1/134131986/dutoned.pdf
    • http://itslm.fun/xifepasifavofimiwoxakeljj8jr.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/napejaxosinages/83662406068.pdf
    • https://s3.amazonaws.com/latufenaw/nosuwepexogas.pdf
    • https://s3.amazonaws.com/rudelazifizuvo/71394515870.pdf
    • http://xojakejib.epizy.com/homework_tracker_sheet.pdf
    • http://xumomevafuvozup.rf.gd/avast_cleanup_utility.pdf
    • https://s3.amazonaws.com/dugibabafod/40571084987.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f728.bin
753dcfe687799a778486f10d3ada5e8ba00e9c943d4c9af1dea1b2363f2c50be
pdf-font-stream PDF embedded font (sfnt) at offset 0xF728 4600 bytes
font_01_sfnt_off000106cd.bin
a95e58066e7bc87fbf3e0ed7db13d508a11f6d0a4eea40f915a6e76e5cdbd141
pdf-font-stream PDF embedded font (sfnt) at offset 0x106CD 10624 bytes
font_02_sfnt_off00012b11.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B11 4324 bytes