Malicious PDF — malware analysis report

Static analysis result for SHA-256 04a5b5a69610ec73…

MALICIOUS

PDF

78.6 KB Created: 2021-03-16 02:03:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a779ba3778bbb35bde234a84371ebc2f SHA-1: c3d44ee4810cbc708940fb72fb0bbeb6b1f8b011 SHA-256: 04a5b5a69610ec739077c28afbee908f37441f615601951466e42346844a6164
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. 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 URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://druttle.ru/wix?keyword=healer+baskar+question+and+answer PDF link annotation
    • http://characduwe.space/the_pyramid_principle_third_editionyhczr.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/aQEchg9/syfy_shows_cancelled.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452161/normal_600573fd4d195.pdfIn PDF document text
    • http://sibuvre.com/bozomuzikutowotawjs65.pdfIn PDF document text
    • https://cdn.sqhk.co/lomekojop/hlmpgho/xifuvusimet.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/cBgjvgd/vapiluwirijuvogofep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383445/normal_5ff9c06744732.pdfIn PDF document text
    • http://bufibinokurun.scienceontheweb.net/tabla_de_puntajes_psu_matematicas_2019.pdfIn PDF document text
    • http://dodajavux.scienceontheweb.net/un_tranvia_llamado_deseo_online_subtitulada.pdfIn PDF document text
    • http://fitdieta.com/pulgadas_a_diametrowsmoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468820/normal_6011ec9139a82.pdfIn PDF document text
    • https://cdn.sqhk.co/sovajepuxe/5jcjgl5/moomoo._io_official_discord.pdfIn PDF document text
    • http://digitalmedialit.com/how_to_cook_fish_fillets_on_weber_qcguk5.pdfIn PDF document text
    • http://kufomabid.mywebcommunity.org/negagobolemokiginidu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454556/normal_603884175cb92.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/gK22YLv/free_mp3_downloads_for_pc.pdfIn PDF document text
    • http://gooddevice-online.com/goledovexegipibudmk2he.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/00139768-7695-47c6-8ad7-3fc3c06b8b17/dugilode.pdfIn PDF document text
    • http://bekusisit.atwebpages.com/realtek_hd_audio_driver_windows_7_dell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45f117b3-95eb-4403-8d9b-cf63abcacc38/what_is_the_role_of_media_politics_and_religion_to_terrorism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd655ae1-95d5-4128-96db-f85f6d022ea6/shark_professional_steam_pocket_mop_replacement_pads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31869703-c6d9-431f-bf84-a6012dc09bb0/78795170034.pdfIn PDF document text
    • http://nunavaxukozu.onlinewebshop.net/philips_respironics_remstar_auto_a-flex_cpap_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/32363636060.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/mitsubishi_eclipse_transmission_removal.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/forgotten_realms_faiths_and_pantheons.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/hip_hop_beat_maker_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4603ce2-621c-411e-a68b-c6bf1c56e79b/47012751926.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_off0000f658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF658 5200 bytes
SHA-256: d9f043b6add9fa70e4a198aa84bbb7c7a48d2f05a3bf484664f04db7f625f700
font_01_sfnt_off0001081d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081D 10584 bytes
SHA-256: eb37d382c8f5ddbd500d93f6cb13497896563ba6e60c08a19d62c98c8f23d385