Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e379f7aae69453…

MALICIOUS

PDF

73.6 KB Created: 2021-02-27 21:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d1a8d7d38ce39291aa087bd38fb187ae SHA-1: 4a4ac985d0ccc11134d0d2cfafc8a760c47b6da0 SHA-256: c9e379f7aae69453c0bc8f0cf4c0d2b400d0c40360257a3065b0475eb5d019d8
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://gimoguvi.ru/award?keyword=hobart+welder+140+vs+190 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402936/normal_60254543cef7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443344/normal_600a54a0b9a30.pdfIn PDF document text
    • https://cdn.sqhk.co/mifopanikil/hcijkhc/91842300604.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/2704934.pdfIn PDF document text
    • https://xaminipa.weebly.com/uploads/1/3/1/0/131071220/5087347.pdfIn PDF document text
    • https://vitozosusa.weebly.com/uploads/1/3/4/7/134727909/vubebebonovogaj_baxos_reboxevigofin.pdfIn PDF document text
    • https://gekipedagap.weebly.com/uploads/1/3/4/7/134750311/2548831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_602a4de150e38.pdfIn PDF document text
    • https://mudabomem.weebly.com/uploads/1/3/0/9/130969182/jomawowetefivopixik.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/boxujetanonikuv/dulfy_gw2_a_star_to_guide_us.pdfIn PDF document text
    • http://zetafilutebes.rf.gd/57124691342.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/chemical_engineering_thermodynamics_equations.pdfIn PDF document text
    • http://dasutako.rf.gd/cold_rolled_sheet_metal_gauge_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/fiche_technique_ascenseur_otis.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/how_to_set_time_on_citizen_eco_drive_proximity.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_off0000e199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE199 5512 bytes
SHA-256: 1af47c5a6b7cb65922b2d4df59a01a8ec7b7a513290183748af5f25dbcc3995b
font_01_sfnt_off0000f479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF479 10480 bytes
SHA-256: b5be0302c06191ede6c79bdaaf9aa32aba0db5faeb0180e0232a62a64d050a73