Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b1df39eaa74bae5…

MALICIOUS

PDF

78.4 KB Created: 2021-04-01 02:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c988aa9261154d8126b44a354791b5d SHA-1: 414b44938e2af2768dad084c801ad5f666486a47 SHA-256: 9b1df39eaa74bae53de07ef98d77694f2d4bfe7ba200175747b32a27af4ce9ca
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to a video file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/123?utm_term=bansidhar+chaudhary+ka+video++mp4
    • https://cdn-cms.f-static.net/uploads/4409248/normal_604fc9a984367.pdf
    • https://cdn-cms.f-static.net/uploads/4413375/normal_6014d54fbf765.pdf
    • https://cdn-cms.f-static.net/uploads/4460457/normal_6021cedcd4cd5.pdf
    • http://jekefidaz.mygamesonline.org/personality_vocabulary_esl.pdf
    • http://likefetevu.getenjoyment.net/creative_sound_blaster_z_vs_sound_blasterx_ae-5.pdf
    • https://cdn-cms.f-static.net/uploads/4386852/normal_6030a7715f46a.pdf
    • http://lenuvivureropi.scienceontheweb.net/how_to_use_micro_needle_pen.pdf
    • http://xovitixekewelom.scienceontheweb.net/the_night_before_christmas_book_amazon.pdf
    • https://cdn-cms.f-static.net/uploads/4422918/normal_6064277067820.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://wutejaxevewef.myartsonline.com/who_makes_snapper_mowers.pdf
    • https://s3.amazonaws.com/borokegujuzero/novel_defeated_by_love.pdf
    • http://kepawomokatuke.myartsonline.com/reddy_heater_30000_btu_parts.pdf
    • http://xekazaz.myartsonline.com/the_cask_of_amontillado_activities.pdf
    • https://s3.amazonaws.com/sugosubexez/captain_america_2014_movie_in_tamil.pdf
    • https://s3.amazonaws.com/xunilukegez/34589310086.pdf
    • https://s3.amazonaws.com/fopalew/nesopal.pdf
    • https://s3.amazonaws.com/mexijegedakol/11821322911.pdf
    • https://s3.amazonaws.com/ditiruz/pasekitewekaxojovule.pdf
    • https://s3.amazonaws.com/sowirutelevolur/one_clue_crossword_answers_chapter_28.pdf
    • https://s3.amazonaws.com/latufenaw/nurelebitenuxiruvotipeder.pdf
    • http://sogivuwe.onlinewebshop.net/ap_module_grade_8_3rd_quarter.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
font_00_sfnt_off0000d703.bin
b1353881f8543334dbf6c2ddb3bf041eafa3272294e56b0d3e51ac907c59b21e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD703 5644 bytes
font_01_sfnt_off0000ea1f.bin
d59f0bd63a3ced5352c58347606ed81a3f40020ef62edcb3969b87f610892fa4
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1F 10396 bytes
font_02_sfnt_off00010dfb.bin
add531c58e7a28c449bbc4fa1fc834ac60877987cd4c094aae2d359e29cc9f76
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFB 8376 bytes