Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb9ea2818c89162…

MALICIOUS

PDF

70.5 KB Created: 2021-02-06 09:38:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: cb2d05996b7ff8c624beb1a1aa2e3f23 SHA-1: ada0e2debbdc9ef1abc0193ebfbee4d0a5b763d5 SHA-256: 7cb9ea2818c89162b240e8341bc3c13fe9c6993638b4e693d180bd31924a38bc
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://druttle.ru/aws?utm_term=characteristics+of+firewall+in+information+security PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4443342/normal_5fcbd68da9f7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427293/normal_600f251cd53ff.pdfIn PDF document text
    • https://tuwunofibe.weebly.com/uploads/1/3/4/6/134657164/8233120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478950/normal_5fe916cf3fa14.pdfIn PDF document text
    • https://taxufutusa.weebly.com/uploads/1/3/4/5/134514166/gizor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446377/normal_6010714ccb075.pdfIn PDF document text
    • http://titanof-filtr.ru/abdominal_pain_during_pregnancykvhxo.pdfIn PDF document text
    • https://vutuzanepe.weebly.com/uploads/1/3/1/4/131453188/677001.pdfIn PDF document text
    • http://fixmarker.fun/lemisixavijum35irx.pdfIn PDF document text
    • http://qwert-ita.fun/custom_performance_exhaust_shops_near_me24ztd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481510/normal_5fdc4ead77349.pdfIn PDF document text
    • https://xadixifiv.weebly.com/uploads/1/3/4/8/134888816/xukuwuza.pdfIn PDF document text
    • https://zatitudebijozi.weebly.com/uploads/1/3/4/4/134460539/06fa8110a3cb.pdfIn PDF document text
    • https://gixoxiri.weebly.com/uploads/1/3/4/7/134707295/b8fb7dadfc.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/sajatofubote/tenifikari.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/uk_cursive_handwriting_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/apple_airpods_android_compatibility.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/west_side_story_mambo_piano_sheet_music.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_off0000d7eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EB 5220 bytes
SHA-256: be79fd0947fddbfd5c1423699e13892fd65811b44987e8bca31195e980e722f6
font_01_sfnt_off0000e994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE994 10252 bytes
SHA-256: e393e6463bc3345f0b844a6fc979581e33c3283aef19a2f556c70a04a33d3111