Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af986584a95663d…

MALICIOUS

PDF

80.4 KB Created: 2021-03-11 13:34:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 66b74935c4fb2a6d765a9e4e6a4ba77e SHA-1: ef4adc051ceddd59984fc94d5c0026f7b3b3ef16 SHA-256: 9af986584a95663dcfa41e3982d3f2b1064fde7244a6ffbc0cf1a61bd5774220
126 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://soxebez.ru/award?keyword=lean+agile+software+development+pdf PDF link annotation
    • https://cdn.sqhk.co/genopeno/eGFjeFm/gravitrax_pro_marble_run_set.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/hjegcii/sizuvifakevawatukanaxo.pdfIn PDF document text
    • http://denizan.com/assent_form_clinical_trialxj3we.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423137/normal_5fcf82a5c405c.pdfIn PDF document text
    • http://uggi-ugg.com/company_of_heroes_2_workshop_not_inge8b1t.pdfIn PDF document text
    • http://podarokinsta.site/taxomefasejadugekogvz24.pdfIn PDF document text
    • http://dijawobal.iblogger.org/1st_birthday_invitation_templates_free_printable.pdfIn PDF document text
    • https://cdn.sqhk.co/gakilofod/e3VgfRq/55570115476.pdfIn PDF document text
    • https://cdn.sqhk.co/tarolaser/QVP8igy/pobulapitotokutimipefafo.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/qija28r/fit_tycoon_business_clicker_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481052/normal_60196a7c74736.pdfIn PDF document text
    • http://instapresent.site/how_to_soft_reset_galaxy_tab_25bw3c.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://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_c234043fb9704056afa557a1a3cb513e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3554f767-0a21-4f35-94e8-6176b268f1f5/epson_scanner_gt_s50_01_error.pdfIn PDF document text
    • http://xifabemifuxiza.rf.gd/kekulosezakutavevud.pdfIn PDF document text
    • https://e0a971b2-7104-4718-9e5f-4f17d768618f.filesusr.com/ugd/6d43b6_bcca9b3c0a6d42899d8c786d27eca155.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d32e52c-3130-4202-9525-d6167437d430/21530884034.pdfIn PDF document text
    • https://ede8a7a3-2377-4e09-926a-401222b31c25.filesusr.com/ugd/81c89d_e030b0a795484748b49df77092cc131c.pdf?index=trueIn PDF document text
    • http://fasadokejofis.epizy.com/break_even_point_berechnung_excel_formel.pdfIn PDF document text
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_e0ccf98921af4b559ad481ca267e7b63.pdf?index=trueIn PDF document text
    • http://jabisuluro.epizy.com/star_trek_discovery_series_3_episode_7_cast.pdfIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_53e4cb5d87f24e1ea3d7179baeede278.pdf?index=trueIn 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_off0000f12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12D 5240 bytes
SHA-256: 13a97fedf7dbffee5e4ba71ef6797697389010126761ab18f6c6abe9e52fb7e8
font_01_sfnt_off00010305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10305 10216 bytes
SHA-256: d7d81a96778dd60bf6080310ca906c504c126cb4d80ea3ed0253c356b2df6147
font_02_sfnt_off000125ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125EF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34