Malicious PDF — malware analysis report

Static analysis result for SHA-256 55286ec4d5a6cd13…

MALICIOUS

PDF

81.2 KB Created: 2021-03-23 04:02:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6e9595a18423d0c527b4d7bd93cfafb SHA-1: e793df604f0ab71c096f169556b852e2d395effc SHA-256: 55286ec4d5a6cd131076ad94dfc4605209cacaf27db3c77f49f79c4b946fa882
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, indicating a phishing or trojan payload. The document body, though heavily obfuscated, suggests a lure related to 'dog breeds list with pictures'. The primary IOC is an external URI pointing to a suspicious domain, likely intended to deliver a secondary payload or phish credentials.

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://resalured.ru/award?keyword=dog+breeds+list+with+pictures+pdf
    • http://nenonazuf.scienceontheweb.net/82500051316.pdf
    • http://zavarivaemvmeste.ru/jejepezopewofix5dpd.pdf
    • http://bomaduworofa.medianewsonline.com/56523367049.pdf
    • http://ttop-shop.com/58277290443tzlxm.pdf
    • http://pasetbs.xyz/62572818779ouawk.pdf
    • http://top-salez.site/88347921335emlmj.pdf
    • http://kajuzumanaz.sportsontheweb.net/jafomuguzu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fofeguj/word_link_cheat_apk.pdf
    • https://s3.amazonaws.com/wukevirenesu/chivas_regal_ultis_1_litre_grand_format.pdf
    • http://raxajabidadida.onlinewebshop.net/possessive_nouns_worksheet_6th_grade.pdf
    • https://s3.amazonaws.com/sorogamat/41528517020.pdf
    • https://uploads.strikinglycdn.com/files/f335a92b-a12e-4a3d-8d02-a7912be838ee/global_warming_map_skills_worksheet_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/7d2d92dd-4cee-4f81-9bf6-4ee9cff4e7f2/75161191471.pdf
    • https://uploads.strikinglycdn.com/files/d720638a-7a0b-4aec-ab49-d63d20bbcfde/sowilolapitotu.pdf
    • https://uploads.strikinglycdn.com/files/8df82c30-8792-4cda-ab9b-7b2e7e96a7d1/mubumunezajiligirigifip.pdf
    • https://uploads.strikinglycdn.com/files/9129b0b1-f958-4ee7-9c82-026415532746/when_does_school_start_in_florida_2020_hillsborough_county.pdf
    • https://uploads.strikinglycdn.com/files/97e323ed-7af1-4efa-8283-b303cf329ec1/nabisalenewap.pdf
    • https://uploads.strikinglycdn.com/files/e79223eb-b908-42db-b8c1-b17a46292b7f/color_theory_wheel_website.pdf
    • https://uploads.strikinglycdn.com/files/5886bb6f-bcb3-4510-a816-5c09e53ad2ce/venazuxedufuvawedav.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_off0000febc.bin
823fdc349740853bf229a5644679c39cc84f613a6eee67020925b5eae54a72dc
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBC 5436 bytes
font_01_sfnt_off0001114c.bin
73a7a12f5c5c067367da420675a64c89aadb905438e93e587b7b703d2f647a6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1114C 11148 bytes