Malicious PDF — malware analysis report

Static analysis result for SHA-256 5579f7ca654ab008…

MALICIOUS

PDF

82.0 KB Created: 2021-03-01 11:47:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 91b2caf5e13ce806f242ad1262cb02ef SHA-1: e486ebe8481b8740e7c4678ad425333c9baf8ec6 SHA-256: 5579f7ca654ab00897a7c64c187380a7cd42a066211e1f8af63787e85ae7a5a1
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/award?keyword=it+recruiter+job+interview+questions+and+answers PDF link annotation
    • https://tumenunomowet.weebly.com/uploads/1/3/0/7/130775025/0f0420.pdfIn PDF document text
    • https://vebexedupatad.weebly.com/uploads/1/3/2/7/132740253/fenesezek_tubareto_resuwufufimoz.pdfIn PDF document text
    • https://duketexu.weebly.com/uploads/1/3/4/7/134725944/bugasotamileru.pdfIn PDF document text
    • https://posajegodat.weebly.com/uploads/1/3/4/4/134477503/ganulelajifogap.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/bicheNF/fox_deportes_xfinity_channel_number.pdfIn PDF document text
    • https://rezibaxuxemabu.weebly.com/uploads/1/3/1/4/131453555/2332249.pdfIn PDF document text
    • https://dovezoluwebib.weebly.com/uploads/1/3/4/0/134017866/rabujuwaburof.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarasam/u8jilc8/kefilavikirodale.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxozamikoge/fjRNL78/reliance_jio_meet_vs_zoom.pdfIn PDF document text
    • https://cdn.sqhk.co/pimupigedu/jipgghf/61837169463.pdfIn PDF document text
    • https://naxaletuzo.weebly.com/uploads/1/3/4/5/134508506/buwama-tedur-dunavuvutopi-tusidofam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/93302917334.pdfIn PDF document text
    • http://xatudoxi.epizy.com/adding_decimal_numbers_worksheet.pdfIn PDF document text
    • http://sipopos.epizy.com/gchq_puzzle_book_answers_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/losejuwexodexiwo.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_off00010618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10618 5332 bytes
SHA-256: eff2d567e7a96daeb8596f83c9ac82e43f00149965b50620685a4e0a1f055458
font_01_sfnt_off00011851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11851 10020 bytes
SHA-256: 110cb2dcc4133d01ed08436f484633816a9c6f0c4be9dbe912f14f03a14d998d