Malicious PDF — malware analysis report

Static analysis result for SHA-256 20a8813ded6ff270…

MALICIOUS

PDF

76.0 KB Created: 2021-03-09 19:06:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e07b49d503f25123c1d4d7e5e6f0d41d SHA-1: 5ff1cb8198f0b9ebf406fc834e512ad6a301abd8 SHA-256: 20a8813ded6ff2703ed28ee2ec61a8a9569facb4a76259e9cab1e380694a8443
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though partially garbled, contains keywords related to pairing devices, which is likely a lure to disguise the malicious intent of the embedded links.

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://midufefew.ru/strik?utm_term=how+to+pair+panasonic+bluetooth+phone PDF link annotation
    • http://pe50off.pro/philips_5000_vs_9000_shaverqkkru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450634/normal_60216fca6cb21.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/godoxudaxaros.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofodatop/Fchj6jj/gps_speedometer_lite_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382631/normal_5fed2e7956398.pdfIn PDF document text
    • http://pixidilivutep.medianewsonline.com/vw_dsg_gearbox_code_location.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459805/normal_6027de79216b8.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/61739999911.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/hbRkhjt/wekekinodakefala.pdfIn PDF document text
    • http://titanof-filtr.ru/gawabawyprbx.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/que_es_el_destino_manifiesto_y_como_afecto_a_mexico.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481539/normal_60274e1a04bd8.pdfIn PDF document text
    • http://magazinrf.xyz/fenosotujajuvisabivetu1w45u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380079/normal_60436e7446956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481516/normal_602c9b45a9715.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/jh73gfp/fababopadaletabusuvefaliz.pdfIn PDF document text
    • http://bigowet.xyz/super_mario_bros_adventure_game_downloadsrrol.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/ijaEc98/diwebeseled.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368488/normal_600dc3790b5e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jabodegodonirad.atwebpages.com/how_to_remove_rosetta_stone_from_mac.pdfIn PDF document text
    • http://megugasawixige.onlinewebshop.net/calculus_for_iit_jee_free_download.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/wobarofosixu.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_off0000ed3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3E 5212 bytes
SHA-256: cc4491ee5cbe3f4adddd12167e059e54505a38171c100284266f45edffa7cec4
font_01_sfnt_off0000fef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF7 10444 bytes
SHA-256: 3c237885f61377850b2e2f8d61c256efe6dce96d082414561dfdd3fb7a5154c5

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