Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ae61917b04fd83…

MALICIOUS

PDF

89.5 KB Created: 2021-03-21 04:24:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 590dcc679a44584f7f1d797d437bf2e3 SHA-1: bc4a8ec3f3b4346489e8ca3a1390f288bead5b60 SHA-256: 45ae61917b04fd83cc281726b4fe79819480d67389b6e13dd6d9d4afb68dd198
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URIs, with a primary external URI pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/award?keyword=carbohydrate+metabolism+pdf+notes PDF link annotation
    • https://fuwewarudizikip.weebly.com/uploads/1/3/4/6/134644733/sukokebaxijoval_faxukaje_duwuropagugigit_salowilozerek.pdfIn PDF document text
    • https://ginubeputugexow.weebly.com/uploads/1/3/0/7/130738710/dekuxijegeze.pdfIn PDF document text
    • https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/fefume.pdfIn PDF document text
    • https://dufubixapitosig.weebly.com/uploads/1/3/4/5/134503348/biwuruvimaku-xivuxo-jopuxixode-sekovexobovemar.pdfIn PDF document text
    • http://voxovisigad.iblogger.org/how_to_make_a_fitted_face_mask_pattern.pdfIn PDF document text
    • http://ziduruwekomowob.iblogger.org/raxomatir.pdfIn PDF document text
    • http://tuligofabuwisa.22web.org/volidi.pdfIn PDF document text
    • https://dopizuledukure.weebly.com/uploads/1/3/2/3/132302960/gekumepemorevop_gutonudorule_pirerovafitefe.pdfIn PDF document text
    • http://mumixubow.22web.org/35922993345.pdfIn PDF document text
    • http://doxedisipi.scienceontheweb.net/97086874073.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/e413a3f.pdfIn PDF document text
    • https://lidimegofomizut.weebly.com/uploads/1/3/1/3/131380930/xitifolig.pdfIn PDF document text
    • http://wuxapogetal.iblogger.org/48621039375.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jagixav.rf.gd/tozimaposaxatuxoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/109a0d7f-5f1f-4edf-b775-d5ef2a2e7e38/tuxitituzufobi.pdfIn PDF document text
    • http://zozusanom.epizy.com/alaipayuthey_movie_songs_ringtones_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e6b9631-2288-463c-9617-02e88879772f/craftsman_5600_watt_generator_specifications.pdfIn PDF document text
    • http://purabozol.rf.gd/62112334115.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/how_to_reset_voicemail_on_mitel_5312_ip_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af03a4a0-bd01-4466-8cae-6a5ab4fd3664/can_i_watch_the_local_news_on_hulu.pdfIn PDF document text
    • http://gupizamowakop.myartsonline.com/puremo.pdfIn PDF document text
    • http://suxanovovogemi.rf.gd/wobulikatapopufopijutej.pdfIn PDF document text
    • http://bufezesaj.epizy.com/vivitek_qumi_q6_pocket_projector.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fbb427a-dcfb-48aa-9032-0f90c1db7b44/how_to_turn_on_onn_walkie_talkie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff3fd885-6ccc-4300-a7b0-b2cd604d6f66/zesugukuvawejewoxuzi.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_off00012154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12154 5428 bytes
SHA-256: f2cf407ef7c7c714e86ca825adc959e1a54b40ec3d5df4c471bfcad3dc3b6a81
font_01_sfnt_off0001339d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1339D 10828 bytes
SHA-256: a21ca37aa61828d87f3374fc84e1c562eceac6c30f3fe6be4114e1b5aedde1c5