Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d68694528a2ef15…

MALICIOUS

PDF

121.4 KB Created: 2021-04-01 10:09:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 99e59530ca825edb85d47160fa9652bf SHA-1: 57b3b3fb04ca5dfa411153d6cfdf6b55974ae518 SHA-256: 3d68694528a2ef15bcb07c87d6b10ee41d3046927c98d500493e3b4eaa4df939
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one pointing to 'gimoguvi.ru', which is flagged as suspicious. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm structure, suggesting a malicious intent to redirect users. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/award?keyword=aircraft+carrier+alliance+pdf PDF link annotation
    • http://wemuwetafivaxe.sportsontheweb.net/my_fios_voice_remote_wont_pair.pdfIn PDF document text
    • http://finonit.mypressonline.com/nomenclatura_de_los_alcanos.pdfIn PDF document text
    • http://finuxezanasa.mygamesonline.org/87538295263.pdfIn PDF document text
    • http://tefuzomabi.iblogger.org/horizons_genesis_sheet_music.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://santand-es.com/nuninunnzubh.pdfIn PDF document text
    • http://lifeeuro.info/what_is_the_best_bread_maker_machinewqbvs.pdfIn PDF document text
    • http://creditscorerepair.info/wotilizatijubowagimanefojbwvj.pdfIn PDF document text
    • http://outputqwvk.space/binixiduxixuf3hqbh.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/67b88636-d75f-4b97-ac23-4db1cf12d7b0/loz_links_awakening_switch_color_dungeon.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/rutuk.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/call_through_wifi_on_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48ed6f53-cae6-4995-8ce1-048421adacbf/who_wrote_the_12_steps_and_12_traditions.pdfIn PDF document text
    • http://fusozevukatamir.atwebpages.com/currency_of_all_countries_in_the_world_with_symbols.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/rusavowomarezusovuvaxadab.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/how_to_read_a_poem_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37361df6-5fff-4c56-8a58-29504a194441/letetubememogizegaji.pdfIn PDF document text
    • http://refusunono.onlinewebshop.net/punjab_textbook_board_mathematics_10th_class.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfae2255-cfd1-40d0-8c9d-92f460b65c7f/75149135607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51b59557-aebb-486b-8f07-015928ed2cac/limujemalagebaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1544a890-beb3-467d-869b-3f9cfe7ad5fa/potopoxufojuworesorabuzan.pdfIn PDF document text
    • http://waxasaxer.epizy.com/calculus_hughes_hallett_7th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/wadexodubimavuxawunamizov.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_off00019da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DA2 4960 bytes
SHA-256: a5703ebf50698a9a01b1aa88f258f7da800e0077a7eee903df522ba2cb5e9a98
font_01_sfnt_off0001ae93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE93 12428 bytes
SHA-256: ede6f4d22bf9f3deb96fbe85ddbf57a2f30f9567f5c62358243734a0545823e8

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