Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ceab477e6bd3061…

MALICIOUS

PDF

83.6 KB Created: 2021-03-10 12:57:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 49d1569a12d2a4222a2e0e877e86d97b SHA-1: 9a3d68fcee7f41dec9cb1ab324034195d25471a0 SHA-256: 0ceab477e6bd3061b10750ff4b456d1b21d9d159594180fe4605e6934da9f0d2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a potential phishing lure related to medical information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further payloads or conducting phishing operations. No scripts were extracted, but the presence of multiple disposable domains and link farms suggests a campaign to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://jumiwimov.ru/award?keyword=alimentacion+parenteral+en+recien+nacidos+pdf PDF link annotation
    • http://trening-ekaterinodar.ru/how_to_replace_a_magnetron_in_a_lg_microwave5lkz5.pdfIn PDF document text
    • https://ditomivowulute.weebly.com/uploads/1/3/4/6/134679561/b1de0239703235.pdfIn PDF document text
    • https://bakogala.weebly.com/uploads/1/3/1/3/131384254/tepinoruk.pdfIn PDF document text
    • http://interbankdigital.com/nikon_l35af_35mm_manual6n2gd.pdfIn PDF document text
    • http://berozava.iblogger.org/19076615027.pdfIn PDF document text
    • https://xexafuru.weebly.com/uploads/1/3/1/0/131070851/fa705e9cca718.pdfIn PDF document text
    • http://mazanatur.space/javascript_radio_button_submit_formo13yv.pdfIn PDF document text
    • http://luwakixifotizim.iblogger.org/tedamefusewun.pdfIn PDF document text
    • http://qlemelest.online/47300662822m0nn7.pdfIn PDF document text
    • https://bakexorogidipin.weebly.com/uploads/1/3/4/4/134437382/7721024.pdfIn PDF document text
    • http://vedoluzomo.iblogger.org/non-destructive_testing_specialists_salary.pdfIn PDF document text
    • http://sdfafq.info/97071598764iy7ag.pdfIn PDF document text
    • http://nuviteb.22web.org/8057544884.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://besasasef.rf.gd/candy_blast_game.pdfIn PDF document text
    • http://tuwemajufa.rf.gd/93637319407.pdfIn PDF document text
    • http://seralugaba.epizy.com/28940763740.pdfIn PDF document text
    • http://ridexinawaje.epizy.com/how_to_write_a_report_essay_muet.pdfIn PDF document text
    • http://saziwujezad.epizy.com/kiwuguwunap.pdfIn PDF document text
    • http://jufofokisib.epizy.com/21906382586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8f66548-0e6a-43ca-ba4e-365330d509f6/is_premier_protein_good_for_you_during_pregnancy.pdfIn PDF document text
    • http://datidalumoz.rf.gd/72394086947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b4c2f79-cc39-4d46-a457-ac1c3919d38f/kugivasib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb8303a4-b337-44f9-963e-f1731f10ca87/zaraf.pdfIn PDF document text
    • http://fojodopid.rf.gd/where_can_i_find_a_list_of_all_stocks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7627bef-8992-4e85-82d3-5fd9cb3ab865/skywalker_trampolines_14-foot_trampoline_with_wind_stakes_purple_weight_limit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89ed46e2-9196-4cbc-97b6-ce9517a1b5e1/17710022518.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_off0001073f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073F 5288 bytes
SHA-256: 06312e5b9afca5f6c211d0436663b29fdfcd707b3d9329a7db98d297e88c7b3c
font_01_sfnt_off00011922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11922 11484 bytes
SHA-256: 6f0effae63a54493714b9028e3b26013a9e8702277d1127bb321335d3d8f38b2