Malicious PDF — malware analysis report

Static analysis result for SHA-256 3692ba4b0abec2be…

MALICIOUS

PDF

77.3 KB Created: 2021-03-22 17:47:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8846fcc01e5dbdf7d0ce1f85c368548 SHA-1: 7ca4c4298d76a4df05b18d1d6d7b1832b641ef16 SHA-256: 3692ba4b0abec2bea7373676e3ebf0fb781a05ace0a2a894c43baa552f58acf9
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that appears to be a lure, disguised as a tutorial. While no scripts were directly extracted, the presence of external URIs and the nature of the detection suggest the document is designed to redirect users to a malicious site, likely to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/award?keyword=javafx+sqlite+tutorial+pdf
    • https://cdn.sqhk.co/notenirikev/hggjjh8/no_crop_instagram_app.pdf
    • http://hangzhoumetal.ru/pobumurarilabisulubukikuxmifk.pdf
    • http://ch-bewertung-2888.xyz/8444340752170g3l.pdf
    • http://znakomstva69.space/negurat3yss.pdf
    • http://jeseselanus.scienceontheweb.net/39526594136.pdf
    • http://brosbass.com/futonuvodzw97.pdf
    • https://cdn.sqhk.co/depivuni/dotjgjb/kgf_theme_ringtone_download_for_iphone.pdf
    • http://sell-toclick.online/80701719967vvg4y.pdf
    • http://meetplafond.xyz/laluvetiruluj8ux.pdf
    • https://cdn.sqhk.co/tavikagisato/j9Y7tqd/xasimazolediraxokis.pdf
    • https://cdn.sqhk.co/tiwefuxab/ig8thgo/paris_metro_simulator_subway_simulator_new_york.pdf
    • http://itdiscounts.info/retaduwiwefugitutijazuzzafai.pdf
    • http://lavka-karamel.ru/vozagaxj9zq.pdf
    • http://idealslim-italiaofficial.site/fozawadoxeb8s6j9.pdf
    • http://mangalvpodarok.ru/biblical_hebrew_alphabet_worksheetsa7e60.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fanalejowegop.atwebpages.com/takinolovemiwatexuse.pdf
    • https://s3.amazonaws.com/jazofi/66592807739.pdf
    • https://s3.amazonaws.com/redegelesibif/pekadiled.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee80.bin
1c14f73515060612942e8b60065b368ba5683889f06dc27cbf731a4736a318ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE80 5280 bytes
font_01_sfnt_off0001008e.bin
73fe2f0aa17dc538ae664077034205c661d359b39582ac0004ec013b48288c20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1008E 11628 bytes

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