Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5a26486a91f8f9…

MALICIOUS

PDF

81.7 KB Created: 2021-03-27 20:15:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b55b3258ec70a1349cdda0efb3e65a26 SHA-1: c621cb578ebaf34a79280683187dd5d94732b74f SHA-256: de5a26486a91f8f9164b3776488a72b7e67f4e6926e25a08c14c68bdce8a926a
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on 'jumiwimov.ru' and 'cdn.sqhk.co', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host numerous links on disposable domains, further supporting a malicious intent. Although no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious content within the PDF structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jumiwimov.ru/award?keyword=7+chakras+meditation+pdf PDF link annotation
    • https://cdn.sqhk.co/lisupixiwe/ijijigj/zopujixagemonaki.pdfIn PDF document text
    • http://topuniversityru.fun/volume_of_pyramid_worksheet_kutazit18.pdfIn PDF document text
    • http://mini-camera-super.club/308401426394q13.pdfIn PDF document text
    • http://pixell.store/hamster_meme_template6x196.pdfIn PDF document text
    • http://stroiline74.ru/kukajosunavesurufodpv8h.pdfIn PDF document text
    • https://cdn.sqhk.co/pevejotomoma/Egjc8hf/adidas_face_mask_black_trefoil.pdfIn PDF document text
    • http://zigorukap.iblogger.org/16967549326.pdfIn PDF document text
    • https://cdn.sqhk.co/ketofebem/dRjjhjj/electric_meter_reading_spreadsheet.pdfIn PDF document text
    • http://card2card.live/38481266356wadrw.pdfIn PDF document text
    • https://cdn.sqhk.co/farovufu/hfJlFwo/bts_waste_it_on_me_song.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
    • https://s3.amazonaws.com/welanisowari/vinipiduvuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fc39dd9-53a1-42b9-a4f3-d7931dad4dee/89365928681.pdfIn PDF document text
    • http://lisudanuzi.epizy.com/wizomesurofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d0e5d73-1aa6-47de-93f8-12f322c87ea9/troy_bilt_2700_psi_pressure_washer_175cc_parts.pdfIn PDF document text
    • http://xebenuxod.rf.gd/jixujeretalixowidefuk.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/is_ideallean_protein_good_for_you.pdfIn PDF document text
    • http://pagosunizuboroz.epizy.com/85216280233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72d93796-bf58-4c37-a414-4a22d1b0f34c/kanegeliveke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f54c6db-d34e-4d61-9f18-c51c132d0587/what_was_the_iron_curtain_referring_to.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b72deaf-8163-4b9e-a3ae-24ecb967ff9e/bookmark_computer_science_definition_of_selection.pdfIn PDF document text
    • http://tepokubomime.rf.gd/detojofa.pdfIn PDF document text
    • http://vodevuparebe.epizy.com/sirezesom.pdfIn PDF document text
    • http://bedigetulo.epizy.com/how_to_diy_home_renovation.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/aramid_fiber_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/nanode.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_off0000f37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37E 5200 bytes
SHA-256: 88d5aa4f3402dd8925e7aa8475282671adba6e49fe3aca59b52c20dfca721333
font_01_sfnt_off000104ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FF 10720 bytes
SHA-256: 1c360e46c58232cfcb23c7b07b722e48cdbe7c385cccc52f1ec58ae14a1f4cc4
font_02_sfnt_off00012951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12951 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3