Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d15d2632eff3d93…

MALICIOUS

PDF

83.4 KB Created: 2021-03-14 14:47:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 96e63c9af7284b78fe705520f98592e0 SHA-1: 5d23bd91146ebea7394c0d4bcb780914c2c402a3 SHA-256: 6d15d2632eff3d93b106756d9da4da4791f4a6508eedfdf35b0a0c0063ce2a3d
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to host or redirect to malicious content. The PDF structure and heuristics suggest it's designed to exploit users by appearing as a useful document, such as 'accountancy project for class 11 cbse pdf download', while delivering a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/award?keyword=accountancy+project+for+class+11+cbse+pdf+download PDF link annotation
    • http://cmb-accueil.com/tm_ac1900_merlin2eayu.pdfIn PDF document text
    • http://gutagige.sportsontheweb.net/puzuvegokavitigobefidoxa.pdfIn PDF document text
    • http://lidlid.xyz/pocket_minecraft_serveromza8.pdfIn PDF document text
    • http://peuly.xyz/history_of_islam_books_in_hindivr7al.pdfIn PDF document text
    • http://zomoxoxuriw.mypressonline.com/7th_grade_math_cbe_practice_test.pdfIn PDF document text
    • http://kifopelidito.mypressonline.com/best_startups_of_2020.pdfIn PDF document text
    • http://gapagal.mywebcommunity.org/77956278319.pdfIn PDF document text
    • http://mirazogiz.iblogger.org/what_gun_to_kill_elephant.pdfIn PDF document text
    • http://new-volosi.ru/17375277923285o9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5221bea3-a482-4e53-b5a2-3f3570a4b69c/xepil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4967a2a-a513-4b09-a330-1f79560d75b7/stihl_chainsaw_ms310_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bffdd384-e39d-4054-bfdb-40bbd82340b5/gonunisikit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5784dfb7-d4ad-4323-a18c-5a6a8d63c453/what_to_write_about_story_ideas.pdfIn PDF document text
    • http://mejumobax.atwebpages.com/arbeitsvertrag_muster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c8f59bb-be66-4628-b7e4-12783c8381a4/road_to_hana_map_from_wailea.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46013708-54e3-48b2-b803-183481fc0f4b/48936240888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0a88459-a913-4406-baa5-8ba3f02fd1cc/how_do_you_know_what_your_life_path_number_is.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c60b5aa9-a8cf-427b-83d3-8451eaef8e3e/pixemimifipatajuga.pdfIn PDF document text
    • http://xixomopez.epizy.com/29854932063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c38a8c34-3bd1-492b-9d35-53556780a2d7/87585194861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f184cd8-abbd-468f-8292-1646b3e0b718/1934173537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b47d82-0545-4e33-82f3-926b27315c09/honda_civic_2012_service_manual_download.pdfIn PDF document text
    • http://kamisobota.epizy.com/the_expanse_book_5_synopsis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e304b93a-d9f0-46ad-a1c2-18997ab25d99/rewepopotawamelupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82490546-7b0b-4c37-91c4-5300379bbbe9/outdoor_first_aid_kit_checklist.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10305 5600 bytes
SHA-256: 0f4baed7fcc66dba65860ce9fd84879b37e7671396a4effcd46cb140d24aba49
font_01_sfnt_off0001163a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163A 12324 bytes
SHA-256: 5ec68aaf5fed1b3f2b3cca4f7a86b56efcfd4038ce009e3e4f5582ae672dad55