Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca457bde4e3ddf99…

MALICIOUS

PDF

76.7 KB Created: 2021-02-20 03:07:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3011b332a1973f466f742ba35267807e SHA-1: 13ebcf8d9143d9e42679b995dc4b6e936929fc52 SHA-256: ca457bde4e3ddf9912ca21cee5c1b787ec6fc507b2dfa2bde0e523bebc3aeec2
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://bologen.ru/123?utm_term=wildgame+innovations+trail+camera+parts PDF link annotation
    • http://idealicaitaly.site/m_k_thyagaraja_bhagavathar_songs_freea0m7m.pdfIn PDF document text
    • https://cdn.sqhk.co/bitenutugiw/Kihhejb/37482786723.pdfIn PDF document text
    • http://kukushka.space/arizona_corporation_commission_form_d_filing83lmz.pdfIn PDF document text
    • https://lofokuvowuvi.weebly.com/uploads/1/3/4/3/134362742/lizuvinevagaxom.pdfIn PDF document text
    • https://zepazilarewar.weebly.com/uploads/1/3/4/3/134310653/bavomig.pdfIn PDF document text
    • https://cdn.sqhk.co/vomawoko/gggfgit/assassin_contract_black_flag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467915/normal_601981e325192.pdfIn PDF document text
    • http://flipping-car.online/ariens_snowblower_dealership_near_meiav8m.pdfIn PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/ropuwebeboko.pdfIn PDF document text
    • https://cdn.sqhk.co/wabasenenem/OPhegdx/lofewisisafusesuruzogeru.pdfIn PDF document text
    • https://mugejonisisekof.weebly.com/uploads/1/3/1/4/131437633/6c525ba.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/nosepevozux/crs_reporting_deadline_cyprus.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/taj_falaknuma_palace_guided_tour.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/kikujufosikax.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/bonds_vs_stocks_performance.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_off0000f008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF008 5468 bytes
SHA-256: ab90af938a8f97a9f64ce6b53aae2e92b0f7d11e350d17bac10e549af5f21a7b
font_01_sfnt_off0001029e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029E 10408 bytes
SHA-256: 561baba03d02f3ea4078d010cd6a7e8c70d4de70cd2b9450124f9d22154af3dc