Malicious PDF — malware analysis report

Static analysis result for SHA-256 b91805c0922545d7…

MALICIOUS

PDF

80.1 KB Created: 2021-03-02 15:13:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 638adfbf7ea133c05fa1f500822c733b SHA-1: 84df9bda270d8b8a4f8cdae1230c4e741f818179 SHA-256: b91805c0922545d702ba4ba020a1b86c5ebed29aeabaf2902f6bb84437d72c6d
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://botokaw.ru/wb?keyword=can%20you%20mortgage%20in%20monopoly%20to%20buy%20property PDF link annotation
    • https://cdn.sqhk.co/wixexozesila/NgfnYjd/wallpapers_for_among_us.pdfIn PDF document text
    • https://jubibesu.weebly.com/uploads/1/3/1/3/131379113/nifawadakutarinu.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/Ftdyiid/birthday_cake_photo_editor_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484997/normal_603910f1456c5.pdfIn PDF document text
    • https://jedifubebevaze.weebly.com/uploads/1/3/4/8/134873515/6619868.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/giZW6gi/54523747673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452372/normal_5fe6e0a1216de.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/smD9jdl/16575493162.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424953/normal_5fd79393a87f5.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/FigibDi/youtube_video_maker_app_for_laptop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373008/normal_5fc860b594bb5.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/iihhig1/47448643309.pdfIn PDF document text
    • https://dunogijejuj.weebly.com/uploads/1/3/0/8/130813547/lemuludexum_fawoja_rewemojiji.pdfIn PDF document text
    • https://cdn.sqhk.co/bagadogod/ywcRicL/68590686874.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/legobegutulo/tascam_dp-03sd_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/libro_teoria_de_las_inteligencias_multiples.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/jaundice_blood_test_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/fopurefixepez.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_off0000fc73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC73 5108 bytes
SHA-256: 23f3a3d851554e2058a59282bd14a47a3fd5026b5ce4c224f8a11c2a6e2c184e
font_01_sfnt_off00010dc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC3 11064 bytes
SHA-256: ebca3854a7a780f7b6b22d17ca3791ecafed531c5ac2180424c260a2c92b8dec

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