Malicious PDF — malware analysis report

Static analysis result for SHA-256 1871ad1adde96534…

MALICIOUS

PDF

63.9 KB Created: 2021-03-01 04:21:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c771d6c86cd3dbb04e676194bcc1b615 SHA-1: 8e1704aeb7212ce8a7a4d1353630e2965effcd11 SHA-256: 1871ad1adde96534d3eaff7cf4f9750fc0aac49fc492c1c9a715d30363a4d952
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://lozipotod.ru/award?keyword=integrated+chinese+audio+cd PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467004/normal_60031567890ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474759/normal_603b9459a1c00.pdfIn PDF document text
    • http://imkl-checker.com/background_ppt_yang_menarikrnsm3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365613/normal_5fe388a6c0267.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408864/normal_5ffdbba75f63d.pdfIn PDF document text
    • http://denizan.com/1066455440539u2w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412583/normal_60349b54c70a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470685/normal_603a486d5cc64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493876/normal_5ff1e7325a6ef.pdfIn PDF document text
    • https://cdn.sqhk.co/wisivelu/alnHiUw/78997781471.pdfIn PDF document text
    • http://whysmall.space/zajasnf4c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426830/normal_5ff6d5d33b8a3.pdfIn PDF document text
    • http://interior.estate/idle_home_makeover_download5121q.pdfIn PDF document text
    • https://cdn.sqhk.co/zejegure/gdJ9ieu/jekafujevususutup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471513/normal_601556b6bda70.pdfIn PDF document text
    • http://roflan.site/dell_ultrasharp_u2913wm_review7l6sk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413226/normal_60239cd12fed1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383322/normal_6026229dbccf3.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_off0000befc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEFC 5104 bytes
SHA-256: 8bd0f6b11f578b5b02af9cd6ca00ac511d8c70f6d15b0f62d53ac61c6148af4f
font_01_sfnt_off0000d053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD053 10076 bytes
SHA-256: ef9e68db2d55c291c7db049c98cf45854888f34f9f191d0dd16ca54d9518920c