Malicious PDF — malware analysis report

Static analysis result for SHA-256 31454c678f730ec3…

MALICIOUS

PDF

79.1 KB Created: 2021-03-24 18:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 073923e9ca68e490724c348f44580698 SHA-1: 7b36502dea15eb762b74ef6fec68df4d14656109 SHA-256: 31454c678f730ec34ee939fc300cd83845dd93190d7aa37a7acfd4f6d3fe7eae
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL pointing to 'nipisod.ru', which is likely used to deliver a secondary payload or conduct phishing. The document body, though partially corrupted, suggests a lure related to movie pitches.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/strik?utm_term=how+to+write+a+pitch+for+a+movie+idea PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373757/normal_5fccd91dd6fbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476936/normal_604b9fd28c6de.pdfIn PDF document text
    • https://cdn.sqhk.co/tusenepobam/cU16hd2/62071056656.pdfIn PDF document text
    • https://cdn.sqhk.co/deloreba/hdhcgc6/vemewoluxo.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvesanap/dLhequb/mebamipevolatil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410030/normal_5fe3b19b1a6d6.pdfIn PDF document text
    • https://cdn.sqhk.co/jegetito/vNidie6/90270567040.pdfIn PDF document text
    • https://cdn.sqhk.co/miwavilusaji/h4Jhfjf/44355109374.pdfIn PDF document text
    • https://cdn.sqhk.co/sijaxovada/hjjgqDG/xuvofenexufalipajow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489412/normal_6007d4a7b81cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454056/normal_604ceb16bfb5d.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosudav/7Vh0hiQ/80034684409.pdfIn PDF document text
    • https://cdn.sqhk.co/sakupiraf/Phfufih/senubegulujemaloredidonug.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/jtgfjfw/soccer_world_cup_2018_full_game.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/gavobawum/69580101469.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/cs230_midterm_cheat_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/896a4eb3-a7b8-4b44-9d7d-5d1f72f7df96/fubaneramafel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27f8fbd2-3607-4209-8566-f9739cb3c28e/kung_fu_panda_3_cast_salary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/add9b09d-5210-4a0c-a6bc-7be004d4aec0/pufetejuxe.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/paloma_tankless_water_heater_code_c4_76.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/dungeoneering_runescape_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/devops_handbook_principles.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/broiler_feed_consumption_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87903bc1-366a-4b0d-b0b9-b9e7b41cca7c/thirteen_reasons_why__jay_asher_read.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/jukulumo.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_off0000f657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF657 5300 bytes
SHA-256: b47ad74d4042b400b4688b7a915a12b43ed5ef6ceead19440c6103d4f965c978
font_01_sfnt_off0001084b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084B 10792 bytes
SHA-256: 1c2ca2f0e6d9eaa93da39be7f667c7a06e9d4c686e5b9b727cffae49282c09ac

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