Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b2a853d267c8020…

MALICIOUS

PDF

78.3 KB Created: 2021-03-17 03:25:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0496319598413c5de24a403d507bf6a6 SHA-1: ab32bf391a7d8a0e9d5c0662c3f5ae7c7af4782a SHA-256: 7b2a853d267c8020d1b1952a83b1ffb5dbd10566e767bd11d892021cb859bc13
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://bologen.ru/wix?keyword=finding+scale+factor+worksheet+kuta', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'finding scale factor worksheet kuta', further supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=finding+scale+factor+worksheet+kuta
    • http://vebuwivatuma.iblogger.org/how_to_add_transmission_fluid_g35.pdf
    • https://cdn-cms.f-static.net/uploads/4415304/normal_603c7bdcebd98.pdf
    • https://static.s123-cdn-static.com/uploads/4463559/normal_5fec9f1f63061.pdf
    • https://cdn-cms.f-static.net/uploads/4495413/normal_600aeff55fa4b.pdf
    • https://static.s123-cdn-static.com/uploads/4379844/normal_60050a8f37d21.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/224ee547-602c-4e09-94ea-b9ac0c1e2038/6862379746.pdf
    • https://uploads.strikinglycdn.com/files/4bd69cdd-f932-4f99-b56d-cde4f26012d5/zuxununo.pdf
    • https://uploads.strikinglycdn.com/files/086ce3c1-45b4-4a65-84b4-428bb56dc368/nizamoxugitam.pdf
    • https://uploads.strikinglycdn.com/files/9178ed6f-6f61-4e69-a3b5-720e3ed3dd44/recorder_karate_songs_with_letters.pdf
    • https://uploads.strikinglycdn.com/files/f0660d18-9e9f-4141-b287-38208eb729df/vipajakikat.pdf
    • https://uploads.strikinglycdn.com/files/500a5e0b-55d9-4f7b-9867-af100f88ea93/estandares_y_expectativas_de_espanol_tercer_grado.pdf
    • https://uploads.strikinglycdn.com/files/024f9fa6-20a5-4256-8d58-d44b3b389906/cub_cadet_parts_manual_download.pdf
    • https://uploads.strikinglycdn.com/files/affdb081-7803-4a8b-a67a-594dfd68918c/mufagisagoruvikajela.pdf
    • https://uploads.strikinglycdn.com/files/b68ba355-a367-4c41-b76b-9e9b749b9be4/variguzobiximuwesoduvel.pdf
    • https://uploads.strikinglycdn.com/files/a4d8cb0b-bccd-4ec5-9eb6-d9e8bc395419/what_type_of_climate_does_chile_have.pdf
    • http://zukisofom.epizy.com/98598038936.pdf
    • https://uploads.strikinglycdn.com/files/a2d7e16a-aec3-415c-b869-98df2a4b26f2/62103065969.pdf
    • http://wadobenozunon.rf.gd/28904699165.pdf
    • https://uploads.strikinglycdn.com/files/d0095923-479e-4900-beea-c2bc85f1c7e3/3058415560.pdf
    • http://lalowarereguwel.epizy.com/acordes_de_piano_en.pdf
    • http://jivirazi.epizy.com/muripirofak.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_off0000e829.bin
10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE829 2900 bytes
font_01_sfnt_off0000f26c.bin
d40b3d240a8f83ff0188e8698b81c76aa5dacc66d1aafccd470f9ce415ce4a57
pdf-font-stream PDF embedded font (sfnt) at offset 0xF26C 5392 bytes
font_02_sfnt_off000104db.bin
7144f17a29af54386e4f8280095f0b5fcc3bbf9151f125d1c962fc72abab7e29
pdf-font-stream PDF embedded font (sfnt) at offset 0x104DB 11336 bytes