Malicious PDF — malware analysis report

Static analysis result for SHA-256 767f75b2d50d31e3…

MALICIOUS

PDF

71.0 KB Created: 2021-02-20 03:06:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 2e1c4cff5a31a74573b4c364634d024f SHA-1: 710750b59ec963f41345c1b26bf9a9ed1611d9b9 SHA-256: 767f75b2d50d31e30d7851744eacfe98fe11cf3ede80eb2a22814b7fd55ea5a5
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://maypoin.ru/wix?keyword=fanboys+comma+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501645/normal_5ff90acb1bb96.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/h0jbIja/17311945898.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409614/normal_600e9e888b1f2.pdfIn PDF document text
    • http://vekvelo.ru/mavuwizumidexu1p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376098/normal_5ff2d9e4b083f.pdfIn PDF document text
    • https://sutivekawexebe.weebly.com/uploads/1/3/1/6/131636655/7907821.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393790/normal_5fe426d4dcf2d.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/IHoichj/wedupilatero.pdfIn PDF document text
    • http://vykupavto54.ru/draw_ten_pin_bowlingaqrx6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426695/normal_5fe22a8d941ef.pdfIn PDF document text
    • http://store50off.info/lebaran_tahun_2020_kapanb9m4j.pdfIn PDF document text
    • https://cdn.sqhk.co/nilamemiw/jgi2je8/smart_launcher_5_pro_price.pdfIn PDF document text
    • https://noruwapawufibem.weebly.com/uploads/1/3/0/9/130969999/5507519.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/aOijgea/microsoft_to_do_list_app_download.pdfIn PDF document text
    • https://zewabezasakaru.weebly.com/uploads/1/3/4/5/134593707/2895eb78389a65.pdfIn PDF document text
    • https://mitesevutij.weebly.com/uploads/1/3/4/7/134717039/1717740.pdfIn PDF document text
    • https://galewijukinez.weebly.com/uploads/1/3/2/6/132695540/bisegigezilob-pufunufididibig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000da10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA10 5360 bytes
SHA-256: d4ef9e74d063acabeac9320b07854f0c0c3dbe1515e8776f88340a9702c3575f
font_01_sfnt_off0000ec3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3A 10092 bytes
SHA-256: 5d0b400dcb9ab5c3d059dd6cc2c5acfe615acd26fe07f3894dbba033724a3baa