Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a72b70fb380ddaa…

MALICIOUS

PDF

77.0 KB Created: 2021-03-11 12:06:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b0ba662e8f7a6d4500600911b979a86 SHA-1: 940c76bf0a1e594507d25faa0a82815752b5ad23 SHA-256: 4a72b70fb380ddaa36f32cfb708feb3b81ee1cbea990601c89f5c8a5e5c6933d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is highly indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. The document body, though heavily obfuscated, appears to be a lure related to Dyson filters, aiming to trick users into visiting the malicious URL.

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://pelibifir.ru/strik?utm_term=how+to+clean+filters+on+dyson+animal
    • http://lumacy.site/17595910615c2amj.pdf
    • https://static.s123-cdn-static.com/uploads/4481515/normal_5ffce5f621bf1.pdf
    • https://static.s123-cdn-static.com/uploads/4412761/normal_5ffc1ccc8d842.pdf
    • https://cdn-cms.f-static.net/uploads/4482413/normal_60401690adcc0.pdf
    • http://dehydratedoriginalgoodness.com/attack_on_titan_aesthetic_wallpaper_desktoplb0ga.pdf
    • https://cdn.sqhk.co/busumodofu/idkT1ja/ufo_enemy_unknown_online_browser.pdf
    • https://cdn.sqhk.co/gasajolop/icbVNbY/radodijinekijugasul.pdf
    • https://cdn.sqhk.co/gufulixofoma/gQQ8Hhj/glavenus_mhw_guide.pdf
    • http://7lessons.fun/dizeka572ti.pdf
    • http://ig-copyrightnoticehelp.com/listening_test_3_book_9_answerst1ts7.pdf
    • http://nonly.xyz/how_to_light_switch_timers_work3jiid.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6663d570-c03d-4062-9cd6-cbb4956c59b7/zogumoximof.pdf
    • https://uploads.strikinglycdn.com/files/ee8fda86-8e33-44f8-ac9b-05ebf7851788/first_alert_co400_reset.pdf
    • https://uploads.strikinglycdn.com/files/d871cd85-925b-4e50-b728-20639c507c01/31067892679.pdf
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_9db929ce9cb042a6bd7b9acece527716.pdf?index=true
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_6a21ba9334654b748594fef0fc63fc69.pdf?index=true
    • http://relilirijupike.epizy.com/66050412761.pdf
    • http://gagipuriligeme.rf.gd/60745330509.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
stream_005_off000101d4.bin
65fc02ac44d50b58305748ac4084a63a2b00ba2dcf50f449034630d727d4ce32
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x101D4 10608 bytes
font_00_sfnt_off0000e424.bin
4e9698865416e259b69e911881a7b1f6e3518ec7c185cc71c14e6178c54547c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE424 5324 bytes
font_01_sfnt_off0000f638.bin
60647be669732315999495f41d25bbccfa8721db7fcd94573166c2f0792152c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF638 2712 bytes