Malicious PDF — malware analysis report

Static analysis result for SHA-256 269643bcd89c0533…

MALICIOUS

PDF

83.5 KB Created: 2021-04-18 13:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7c66c4fcaaec33ecd44e8e67f6b2d3e1 SHA-1: 723e0d8994289c044541ad2abd4c366538ffb35a SHA-256: 269643bcd89c05334e03e1f07ad0f35043ccaa54f2947d360fbece9bdd04127d
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were directly extracted, the PDF structure and external links are indicative of techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/strik?utm_term=basic+english+words+in+japanese PDF link annotation
    • https://gamuzajebi.weebly.com/uploads/1/3/4/4/134481120/sejukalibemew-jorofaxonujede.pdfIn PDF document text
    • https://vobakedipevurot.weebly.com/uploads/1/3/4/6/134661611/lekamorerovalazugan.pdfIn PDF document text
    • https://dewufore.weebly.com/uploads/1/3/4/8/134857007/9996139ef80a8c.pdfIn PDF document text
    • http://fotodosajube.22web.org/atorvastatina_vs_rosuvastatina.pdfIn PDF document text
    • https://bigikudas.weebly.com/uploads/1/3/0/7/130775628/solidunesi-susenobulu-jitovewoburezo-nogitilegavij.pdfIn PDF document text
    • http://watodakazo.22web.org/xebigatibopusikuto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gujusama.rf.gd/lakinenov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f489c3bc-ac07-4095-8f05-e4c8ec942b6b/udemy_-_selenium_webdriver_with_python_3.x_-_novice_to_ninja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6b79739-b395-440d-905a-c7f34703b4f6/69651421604.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/wafebijurufemozalagol.pdfIn PDF document text
    • https://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_3b841632349242c4847922f46567e6b8.pdf?index=trueIn PDF document text
    • http://luvojidepezepag.epizy.com/68773762667.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/the_game_of_their_lives_2005_film_watch_online_free.pdfIn PDF document text
    • http://gitipezusev.rf.gd/ncs_cartoon_song_pagalworld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a448a8b4-e863-410f-aec2-28d4595b8130/nodokegokeforexenidokef.pdfIn PDF document text
    • http://wobemiko.epizy.com/bloc_quebecois_party_platform_canada.pdfIn PDF document text
    • https://1dfef493-bba3-4db0-89f7-7cef958ceea2.filesusr.com/ugd/3dbeb3_de295870f28647538e34bcd67dbf0872.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/690e8873-f087-463f-b646-e07ce46a5607/what_is_candle_magic.pdfIn PDF document text
    • http://nonomajemiw.rf.gd/29031099613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09617ce0-499a-4148-bec5-d6afd114add7/garrett_ace_350_vs_300i.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/44285686985.pdfIn PDF document text
    • http://tizijur.rf.gd/28296799045.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD3 5260 bytes
SHA-256: c8e511f18cc805955c919e91ab12b0e2fac0139909332ba94f97a0d19937978a
font_01_sfnt_off00010cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAB 11184 bytes
SHA-256: 694aff293a8456ce6ac944104316e9180f3538ab84aa65cfb67310c4da7808d6
font_02_sfnt_off000132be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132BE 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2