Malicious PDF — malware analysis report

Static analysis result for SHA-256 753662c6a06cd2d6…

MALICIOUS

PDF

74.8 KB Created: 2021-04-10 19:42:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f7146e06c198503567593b709a6b7815 SHA-1: 7b148711c63bd9bcdb08c2014ff9e8e5dcf58d0c SHA-256: 753662c6a06cd2d6c0ad653e4a66016a40e7d6803f358c9ca945a45897b9ae76
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the overall structure suggest an attempt to exploit user trust for malicious purposes, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://gimoguvi.ru/strik?utm_term=java+gui+programming+eclipse PDF link annotation
    • http://zuzatew.medianewsonline.com/tajozajofisiruzoxageza.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/zuvata.pdfIn PDF document text
    • http://mazers.fun/45400234287cwh1p.pdfIn PDF document text
    • https://gelasinez.weebly.com/uploads/1/3/4/7/134763890/a66d4e4ce5f782.pdfIn PDF document text
    • https://cdn.sqhk.co/rumunofa/gyigheF/hp_elitedesk_705_g4_mt_datasheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444866/normal_6057cdb0d9e60.pdfIn PDF document text
    • https://sowematawenuw.weebly.com/uploads/1/3/1/1/131164153/wavowokigotodarazuju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461744/normal_5ff5cc864f962.pdfIn PDF document text
    • http://2020coupons.info/869686688028fdeo.pdfIn PDF document text
    • https://videxopefofima.weebly.com/uploads/1/3/4/1/134131768/vekav-jorepasagivara-zodogutu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415770/normal_605d836f1b609.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzixamover/Yihgfih/baby_boss_2_game.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/Ogg3gdA/governor_of_poker_2_full_version_free_download.pdfIn PDF document text
    • http://ionatr.fun/bulezupevugirinijoku16qsh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501975/normal_600178f5ed2eb.pdfIn PDF document text
    • https://filalodov.weebly.com/uploads/1/3/4/6/134673241/7352512.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426257/normal_600dd032cd01a.pdfIn PDF document text
    • http://forkidsshop.online/bedtime_stories_movie_main_charactersh64oo.pdfIn PDF document text
    • https://boserizozililo.weebly.com/uploads/1/3/2/6/132682878/jemiworido.pdfIn PDF document text
    • https://cdn.sqhk.co/denobafopum/ggilHgd/omron_blood_pressure_cuff_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/rixosadiv/shfkfO7/top_100_drama_movies_of_the_2000s.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/c8f0f189-45df-4bda-ac69-8f3906ffcad2/jofip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/363198dd-7ffe-4eb3-bcc1-a9da37c89fbf/disney_world_dress_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fe9a0d7-6463-4345-bef0-fa61d247c40f/whats_the_difference_between_220_and_230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/032c7671-5fcd-4e89-8fd0-e4c404fae1d8/46402623683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/465ea569-e9fe-4afc-8e58-94182837b787/how_to_use_a_z_score_table.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_off0000e7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F2 5300 bytes
SHA-256: f5e9cdf25060db7c73f19e836c62e7a446b0fe2bc9850485e90c7712e0db906e
font_01_sfnt_off0000f9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F6 10392 bytes
SHA-256: 256f14cfc924c0b034da53a082c2b2f44db2fcd5988aad69fdbf0bdc0313a304