Malicious PDF — malware analysis report

Static analysis result for SHA-256 772d7c3f52344e24…

MALICIOUS

PDF

70.8 KB Created: 2021-01-24 16:07:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8ede7c4e1ba92202b21653128a7b0a9f SHA-1: 8504c72dc55cb5c2ff659353c63e01b0dca85e16 SHA-256: 772d7c3f52344e24b67a4f0ad17e1750564d4f49841612995d1113bf2bbd5a46
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 'traffnew.ru', which is likely the initial lure for a phishing or malware download. The document body, though truncated and obfuscated, contains text related to a 'software update on macbook pro', reinforcing the phishing pretext.

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://traffnew.ru/wb?keyword=software%20update%20on%20macbook%20pro%20not%20working PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410459/normal_5ff7ce52b4358.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498678/normal_5fd883b458ac0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495399/normal_5fefa904694b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416934/normal_5ff3877d1c41d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413697/normal_5fef46601221e.pdfIn PDF document text
    • http://klossheff.xyz/94446569588w7d48.pdfIn PDF document text
    • https://cdn.sqhk.co/bomunerafoju/jajbjjl/3525209781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5fd76e3d9ff03.pdfIn PDF document text
    • http://akillidestekbasvuruformu.online/57461344923di4wd.pdfIn PDF document text
    • https://cdn.sqhk.co/libegavezu/7AgdhbX/usar_stickers_de_telegram_en_whatsapp_iphone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416501/normal_6005fa4a91a3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479454/normal_5fe66b0942294.pdfIn PDF document text
    • http://normab-id.com/545313987067qya7.pdfIn PDF document text
    • http://vodoroding.info/kitty_cat_story_cat_avatar_makers6a32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446379/normal_5ff93399efab8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489264/normal_5ff805895cc8f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/cantoral_liturgico_san_pablo.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/ashish_kumar_song.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/carbonless_form_printing_service.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/27334234715.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_off0000d5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FE 5664 bytes
SHA-256: 7485334e16858ca8279cb59413ef961c42bcc940baae6fbe22bbb4025b0bfe6b
font_01_sfnt_off0000e947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE947 10732 bytes
SHA-256: 73653f85252656d6e5c653fb520ed00764785ec223034ab21e2fb1026fc4b821

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