Malicious PDF — malware analysis report

Static analysis result for SHA-256 1025d378abf01e64…

MALICIOUS

PDF

67.4 KB Created: 2021-02-28 12:08:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 54b15227597ad805621bedc1a546e027 SHA-1: 47edf94ab4ccd27305b07c96336fadce1b4dd1ba SHA-256: 1025d378abf01e64dbe3d03b82369c41e1b9f361cef28cccd31dd5bed397bad3
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=correcting+sentence+fragments+and+run+ons+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485696/normal_5ff54f3819699.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374847/normal_5ff8f2278117f.pdfIn PDF document text
    • https://davabodijesofid.weebly.com/uploads/1/3/4/4/134474123/dibilaxo.pdfIn PDF document text
    • https://detubutil.weebly.com/uploads/1/3/5/3/135348338/dijeverutot.pdfIn PDF document text
    • https://negapopede.weebly.com/uploads/1/3/5/9/135994143/josenagebidixugok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409801/normal_6002eafe499a6.pdfIn PDF document text
    • https://tulalesin.weebly.com/uploads/1/3/4/8/134876190/xubeba-libutofomiroz.pdfIn PDF document text
    • http://meriline.store/mfj_259c_antenna_analyserdoycj.pdfIn PDF document text
    • https://cdn.sqhk.co/suxavawudomo/gchihmY/7950391179.pdfIn PDF document text
    • https://zorisurirumu.weebly.com/uploads/1/3/4/6/134600588/guvesikafebag.pdfIn PDF document text
    • https://nemotepazifoki.weebly.com/uploads/1/3/0/8/130814284/145a6dbef7e1.pdfIn PDF document text
    • https://jinunezig.weebly.com/uploads/1/3/4/3/134308797/20658e63f.pdfIn PDF document text
    • https://kobizixudowizeb.weebly.com/uploads/1/3/4/4/134402546/9806401.pdfIn PDF document text
    • http://the-english-temple.com/stahlbau_skriptgjdae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478961/normal_6017a399972e0.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/4TjjbPH/halloween_dress_up_games_deviantart.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417526/normal_600830fef09d3.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_off0000cc45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC45 5464 bytes
SHA-256: b0b1593511d0bedb4f9ef83ae874f7137d5973ccb46c1197f5b0cd6672e02cf3
font_01_sfnt_off0000dec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC4 9900 bytes
SHA-256: c166afbd9b3d00c268a948d94f1c17af12ecd8a4fe0c719dab59b1e005c28ae2