Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb619b3f4ba865a…

MALICIOUS

PDF

76.4 KB Created: 2021-02-18 01:05:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9cadbaae12f90727cff8981f326e6036 SHA-1: 6e957490678ce7af369512cb892e5d5bdc2cf09b SHA-256: eeb619b3f4ba865aa717a858c9c9dd93cf4ddc7f5b6fa1e7b743af03ea12dd78
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with critical heuristics indicating it functions as a malicious redirector and a link farm hosted on disposable infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=can+lock+picking+damage+locks In PDF document text
    • http://fezomoworiva.22web.org/gndu_date_sheet_b._com_5th_sem.pdfIn PDF document text
    • http://testersairf.xyz/pinball_arcade_ps4_tables_listpj16f.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/hhRghic/rotten_to_the_core_song.pdfIn PDF document text
    • http://secret-empire.ru/ricetta_caponata_siciliana_di_melanzane_in_agrodolceiufd2.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/zwihelO/new_york_guided_tours.pdfIn PDF document text
    • http://hugertely.xyz/kufonund82j.pdfIn PDF document text
    • http://littlenat.space/prestige_medical_advance_b_autoclave_manual9tsjf.pdfIn PDF document text
    • http://prodive.su/go_fish_card_gametsnfk.pdfIn PDF document text
    • http://italysummer.fun/14608509356ttb2o.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/N3Ngdid/car_racing_games_download_for_laptop.pdfIn PDF document text
    • http://ulekschool.online/jegujugigamujon77hja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495838/normal_6002bc561ff7c.pdfIn PDF document text
    • https://cdn.sqhk.co/bowawugafux/u2IJjd2/xabebimubute.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458625/normal_6014bd74b2683.pdfIn PDF document text
    • http://organicnu.info/kabikejevaza149.pdfIn PDF document text
    • https://cdn.sqhk.co/razotefo/jlgjNje/game_for_cats_ipad_free.pdfIn PDF document text
    • http://topagut.iblogger.org/53013886967.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pekijokedod.rf.gd/bibawowijom.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_off0000f11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11D 5268 bytes
SHA-256: bf6c3d5c3d50f4fbd7abe16bbd237c42e9ddb89e09d2a36ec8f1ffb4eae393a7
font_01_sfnt_off000102f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F6 9864 bytes
SHA-256: e4d3003a6367d4b87b54b8f05a500cf95ca5843ea79f82daaaf5c992c3e761f4