Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c290ad1aebe8a5…

MALICIOUS

PDF

81.8 KB Created: 2021-03-13 15:08:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6b01bab24f000e92380ab76b3d6994b0 SHA-1: 0d9297a0c5f6e1cb00afb72f3bd7f023327a8b8d SHA-256: 00c290ad1aebe8a58e58a72b98c4c306c298742048d5f1855157637d12168f99
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous external URIs, many pointing to disposable hosting, and is identified as a link farm. The presence of embedded URLs suggests an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/wix?keyword=delver+apk+full PDF link annotation
    • http://zugasanuko.getenjoyment.net/aviva_chomsky.pdfIn PDF document text
    • https://cdn.sqhk.co/vigesiji/gdtlXgg/whatsapp_business_app_download_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/xobetetivuzi/jgTisge/66446250470.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/44116933700.pdfIn PDF document text
    • http://muxoman.mygamesonline.org/analog_computer_examples.pdfIn PDF document text
    • http://wudaxozibutix.sportsontheweb.net/vicks_cool_mist_humidifier_filter.pdfIn PDF document text
    • https://cdn.sqhk.co/ziriziwebu/hjhfsvl/majefasojudexarixa.pdfIn PDF document text
    • https://cdn.sqhk.co/mogudekusab/Hhbjbic/tuning_fork_sound_healing.pdfIn PDF document text
    • https://cdn.sqhk.co/bifugudawesu/BwibnfG/photosynthesis_lab_report_introduction.pdfIn PDF document text
    • https://cdn.sqhk.co/turanexode/iHmQUxk/34166676170.pdfIn PDF document text
    • https://cdn.sqhk.co/kurafuso/jSBtjfc/white_noise_generator.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/5668499497.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/9ff18b9d-124c-4f15-befd-d2c2e9ddf493/how_to_sell_trading_cards_online.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/volume_strain_deformation.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/accident_manual_south_eastern_railway.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6b8f0ea-91af-4e5e-81e5-d52bdffe0a62/tokolebomatusuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02fa7d48-f8f4-4473-b02d-0ad0f31bb7de/proform_hybrid_trainer_xt_-_exercise_bike__elliptical.pdfIn PDF document text
    • http://nozozuwovore.atwebpages.com/68224391727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98ed7242-73db-432d-8a34-54db88169e79/52815050525.pdfIn PDF document text
    • http://lusajafimaneru.myartsonline.com/can_a_18_year_old_date_a_16_year_old_in_maryland.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE923 4840 bytes
SHA-256: fcedc4f8b436d51e91c36212a1f7252ff2595a761339bdbb838dd3becb3eaf42
font_01_sfnt_off0000f9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BE 12320 bytes
SHA-256: 28a9396282cc1d76d2d1deb1c15a8c11b84abe20713fa8e4efe1e56cef0a7741
font_02_sfnt_off000122e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E4 16172 bytes
SHA-256: e1849fa7fd2a676d2cf669123fa79f45405477eb4bcef7f1b8f2b108fc4647b6

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