Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4e6ffe71d6eba73…

MALICIOUS

PDF

75.0 KB Created: 2021-04-09 08:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d08ff82646dcbce994c6de14c3d875f SHA-1: 28393c48f8b832002afa7034d4c3d4b88c6b937d SHA-256: b4e6ffe71d6eba73ba671c0c9393aa22bc9c50257d9a1e133499d040c23dd2fd
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 URI pointing to 'ponafet.ru', which is likely the malicious landing page. The document body, though heavily obfuscated, suggests a lure related to medical information, aligning with common phishing tactics.

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://ponafet.ru/strik?utm_term=what+will+a+crp+blood+test+show
    • https://cdn.sqhk.co/miburixegapu/wigggbe/46027761809.pdf
    • http://uaregroup.com/vudejorojejejef9cw1l.pdf
    • http://winoraama.website/lemubesjyu.pdf
    • https://cdn.sqhk.co/vumivatuvi/1Sg1Thd/70233621777.pdf
    • http://jadebey-x.com/arcanum_unbounded_read_onlinex3lxb.pdf
    • http://tewazezila.66ghz.com/how_to_unlock_door_whirlpool_washer.pdf
    • https://cdn.sqhk.co/vujenibolo/ehfGcjc/kujifadumasonafulowibuv.pdf
    • https://cdn.sqhk.co/lexaxemiji/HxhbicE/best_vanilla_frosting_recipe_for_chocolate_cake.pdf
    • http://winefesa.22web.org/makkar_ielts_speaking_january_2020.pdf
    • https://cdn.sqhk.co/mapuvokunoj/agfjimm/vumajiramaluviw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/52d38b58-f96c-4dca-a4f7-06eeac587c67/razasidiza.pdf
    • https://uploads.strikinglycdn.com/files/d60f0a76-12ad-4003-8177-701ca1e626bd/muvutanade.pdf
    • https://s3.amazonaws.com/fosawef/foxelasesiluvefulaxani.pdf
    • http://janeresofopojaz.epizy.com/ytong_blocks_data_sheet.pdf
    • http://bumusilofinufaf.rf.gd/how_to_connect_bluetooth_mouse_mac.pdf
    • https://s3.amazonaws.com/genijusemu/accuracy_and_precision_lab.pdf
    • https://uploads.strikinglycdn.com/files/7bb0e769-60a1-4623-9839-40c5745efc63/365_days_of_drawing_prompts_sketchbook.pdf
    • http://mekemiwi.rf.gd/88139674620.pdf
    • https://uploads.strikinglycdn.com/files/0bbfea21-2d48-4231-be72-564cad7d739f/what_is_the_difference_between_dyson_v7_motorhead_and_animal.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea34.bin
9b0f543081b64747b2e47cc41e20aff5538b241148af8cde417c9a2cbc0c5c0c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA34 5408 bytes
font_01_sfnt_off0000fc9c.bin
8b3be99f38cfc92e8511ff9f58e6d50f1fc0fce33866ae4e6bfabbcdbd6c9f20
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9C 10200 bytes