Malicious PDF — malware analysis report

Static analysis result for SHA-256 87b1ca77b181f6e7…

MALICIOUS

PDF

72.8 KB Created: 2021-03-02 07:23:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 53ef4fa1d8a1bc27c6a7bcae5d19a186 SHA-1: ef422322088aa1176aac9b24c2170f21e319cca7 SHA-256: 87b1ca77b181f6e76e6fd34e2d99d7dae8ed89399b3fad3d61b444a7a10db4bc
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/wix?keyword=itunes+gift+card+generator+reddit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447663/normal_5fd67cba88710.pdfIn PDF document text
    • https://jaxuwigoba.weebly.com/uploads/1/3/4/2/134266140/dejuxumaras.pdfIn PDF document text
    • https://pulimogub.weebly.com/uploads/1/3/4/3/134312020/e8b2b40d1256648.pdfIn PDF document text
    • https://vedabigejiko.weebly.com/uploads/1/3/1/4/131438046/e412d321.pdfIn PDF document text
    • https://sufidubiziden.weebly.com/uploads/1/3/4/7/134732268/7288416.pdfIn PDF document text
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/6338d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416501/normal_5fe3e74e17d0b.pdfIn PDF document text
    • http://kenijukawog.22web.org/sql_server_2019_developer_edition.pdfIn PDF document text
    • https://wunaramalus.weebly.com/uploads/1/3/4/5/134576193/xufugadosajenofa.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/8326818.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/legesiliv/71008872875.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/chinese_ghost_story_game_english_version.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/security_logo_design_vector_free.pdfIn PDF document text
    • http://weluwekew.epizy.com/39695245368.pdfIn PDF document text
    • http://jasetaroxakil.rf.gd/ivoclar_emax_cementation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/livaluzele.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/zajuxas.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/ana_scope_and_standards_of_practice_and_continuing_education.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_off0000e006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE006 5092 bytes
SHA-256: ba7e702a9feedf8026c85059f7a55ac715f5694a852f8e66ec85bd3f5eb84307
font_01_sfnt_off0000f16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16D 10676 bytes
SHA-256: ea61f41c10a7229f2be72ff3c61875c9bedec07d7936a6f1b0d3689d5fc0a77f