Malicious PDF — malware analysis report

Static analysis result for SHA-256 8496ce20368d8caf…

MALICIOUS

PDF

71.3 KB Created: 2021-02-18 01:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b96393bd65e36c9397943105d6d86137 SHA-1: 1bcd63e65b0258a7c222470a42ea109485088bcd SHA-256: 8496ce20368d8caf8843129eb3a00e42b270e85dd905ebfbf539321d348bb2d9
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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/123?utm_term=why+is+my+logitech+keyboard+not+connecting PDF link annotation
    • http://xorasogolu.22web.org/aes_full_form_in_safety.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445338/normal_5fefc2efc13b5.pdfIn PDF document text
    • http://bobejitamatu.iblogger.org/52389839921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420760/normal_6019d91638a2b.pdfIn PDF document text
    • https://cdn.sqhk.co/riwaxagi/obdthdT/xipexasefuduvis.pdfIn PDF document text
    • http://kilagine.22web.org/audio_do_whatsapp.pdfIn PDF document text
    • http://wakogapenubez.22web.org/piwijigexefatamikuk.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/jenisozazewubo/office_2016_crack_full.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/suralazasuxetagimaf.pdfIn PDF document text
    • http://wopaxigaromuf.epizy.com/4550149401.pdfIn PDF document text
    • http://vezelivami.rf.gd/domain_and_range_graphs_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/tupisowamututesufep.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/70429014692.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/colliers_canada_office_market_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/atualidades_concurso_2019.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_off0000dacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACB 5672 bytes
SHA-256: 5872f1578c32c4f97b7e36d8fba4f5d2b8e2affcff1c92d40baddf31d7355500
font_01_sfnt_off0000edfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFA 10024 bytes
SHA-256: c91920fcf432ae0732a311d2e189c6c9a9edc39ce455d9ce30be3e4fe54eeb24