Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a7411bbd88cf6f1…

MALICIOUS

PDF

71.9 KB Created: 2021-02-18 21:54:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: aa03059042a450870fd4b71be0f4c35b SHA-1: 7353b75b989810ea2cbf7a2a1023dc0fd0979a27 SHA-256: 3a7411bbd88cf6f1cce41446eece1c3ff9c4a4e3b19a7c518a8b740ad3df1f93
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to host or redirect to malicious content. The document body, though heavily obfuscated, suggests a lure related to educational worksheets, which is a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wix?keyword=homophones+to+too+and+two+worksheets PDF link annotation
    • https://cdn.sqhk.co/xeliwiwogivo/0eLXfQ4/kowuribizijofowijola.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/NMZjjjj/icy_hot_cream_vs_patch.pdfIn PDF document text
    • https://cdn.sqhk.co/faxenukev/hazgehc/6511286731.pdfIn PDF document text
    • http://b4shop.icu/printable_tarot_cards_with_meaningsqxa8e.pdfIn PDF document text
    • https://cdn.sqhk.co/wanadujogo/VW7iaoN/old_phone_keyboard_layout.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/hifochi/70921389287.pdfIn PDF document text
    • https://cdn.sqhk.co/muwizavo/hhibnhi/47956918408.pdfIn PDF document text
    • https://cdn.sqhk.co/devuzemalut/FjhUghQ/attack_the_light_all_fusions.pdfIn PDF document text
    • https://cdn.sqhk.co/xugumewaz/hix5jij/dalijemejerisilarebefove.pdfIn PDF document text
    • http://mirror-x.org/ejemplo_de_pedimento_de_importacion_llenoze7ao.pdfIn PDF document text
    • http://myluckybet.xyz/australia_student_visa_checklistql8du.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386076/normal_5feb58f99ce93.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/4fjdifN/60222507525.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/jjiagfR/jixixeganilobenavow.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/jidhbjb/amazon_music_hd_price_annual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD50 5284 bytes
SHA-256: 3b43a50ed866e021fbffbc524c9d9f324d668d9dc542bc4f17401f68d2a84134
font_01_sfnt_off0000ef26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF26 10532 bytes
SHA-256: 59a1648b9d9532368e2cbe0b0ddb7d8722ed5f969ce3b7f7673fe77077b6115d