Malicious PDF — malware analysis report

Static analysis result for SHA-256 82be834635319b3d…

MALICIOUS

PDF

76.7 KB Created: 2021-03-15 12:21:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27d3a0943ee784ab3fd64afc0f284c33 SHA-1: ed47667b2d0153487b661ea7c9e60335217ce6a3 SHA-256: 82be834635319b3dcdfdffa6b667f2224e76fcd9088b385d43218735a979ef15
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to host phishing content or a further payload. The document body, though heavily obfuscated, appears to reference the URI's apparent subject matter, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/strik?utm_term=bose+901+series+6+version+2+review
    • https://static.s123-cdn-static.com/uploads/4366047/normal_5fca678837b0e.pdf
    • https://static.s123-cdn-static.com/uploads/4477181/normal_5fc95130ad07c.pdf
    • https://cdn.sqhk.co/gekobegij/aUKhiDW/sonic_the_hedgehog_characters_costumes.pdf
    • http://dietnatur.fun/integrated_chinese_workbook_answers_level_2_part_17t6wf.pdf
    • https://cdn.sqhk.co/fejisedetu/jhoEDEq/grandma_s_house_escape.pdf
    • https://cdn-cms.f-static.net/uploads/4409806/normal_602937444b1d9.pdf
    • http://repair-monokoles.ru/93763625747spr67.pdf
    • https://static.s123-cdn-static.com/uploads/4469640/normal_6001573e3ef97.pdf
    • http://svoydvalend.xyz/romeo_and_juliet_act_2_scene_6_stylistic_devices0jp68.pdf
    • https://cdn-cms.f-static.net/uploads/4387567/normal_604049059b919.pdf
    • https://static.s123-cdn-static.com/uploads/4367916/normal_5fce9bc8ce392.pdf
    • http://baranaydin.org/what_is_the_triangle_offense_in_basketballp5gnv.pdf
    • http://pe50off.info/eddie_bauer_pack_n_play_bassinet_weight_limitjw6r2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b87eb58a-4ad2-4fea-8880-24687181bed5/perfil_de_egreso_conalep_alimentos_y_bebidas_2019.pdf
    • https://uploads.strikinglycdn.com/files/91aed543-1ee5-4e1c-b352-bbd2fcccc11e/juwonezumat.pdf
    • https://uploads.strikinglycdn.com/files/55d891d6-294e-4ebb-87df-5de4dd833ddb/50056575599.pdf
    • https://uploads.strikinglycdn.com/files/be406be8-297b-4ecb-bab0-ddb439881782/753632083.pdf
    • https://uploads.strikinglycdn.com/files/d56fe4c2-66f3-414e-b587-eea62e7a6cc4/dlink_dir-601_install.pdf
    • https://uploads.strikinglycdn.com/files/7b81b7ce-daa1-4e85-8aec-cbd9f7c07396/51717784696.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_off0000f11a.bin
391f1b8bb8263a0af91d6ed5595af9eed55d5a3764111fff761056e362af0af6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF11A 5272 bytes
font_01_sfnt_off00010336.bin
40e2237d5395b9c119cca12bb775fbd7810690a657c5647914ca428059ecc97f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10336 10084 bytes