Malicious PDF — malware analysis report

Static analysis result for SHA-256 c77aedb4e2bb47d3…

MALICIOUS

PDF

74.0 KB Created: 2021-02-04 02:39:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8404cc1341c80661ae51e60e6e2a466e SHA-1: 46b49e9a71b60e19366d8dcbe0ab1d0d10078877 SHA-256: c77aedb4e2bb47d39a46fe77ebc1438287a57f566ed4ac18f795752d536a2641
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://seumenha.ru/123?utm_term=hms+gloucester+crest PDF link annotation
    • http://hookup673.site/benco_dental_catalogvsx3b.pdfIn PDF document text
    • http://bofinaposo.iblogger.org/apostle_paul_timeline.pdfIn PDF document text
    • https://nawawedivoxoni.weebly.com/uploads/1/3/4/7/134719505/bukotegenozavalu.pdfIn PDF document text
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/1781528.pdfIn PDF document text
    • https://cdn.sqhk.co/mikitikotak/hc0jjii/flight_simulator_2020_vr_beta.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/idiefGO/chrome_music_lab_songs_easy.pdfIn PDF document text
    • https://cdn.sqhk.co/bulenupulabo/N2hhJgi/96814214097.pdfIn PDF document text
    • http://donbetosstreettacos.com/42161237129x2k48.pdfIn PDF document text
    • http://furniture21.online/descargar_corel_draw_x8_gratis_en_esj35pc.pdfIn PDF document text
    • http://fruits-summer.fun/waviwawogoxamajibumavotuzw3ojg.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/jemazejodep/naginojajoxumafoduweke.pdfIn PDF document text
    • http://doroxokile.epizy.com/video_celine_dion_power_of_love.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/cigarette_smoking_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/jugidutizadoxapi.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/79391480170.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_off0000e591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE591 4872 bytes
SHA-256: 60632b4f1e9f6284f237e7d0e90fd736dd328844a72740cc04715a37f72e5400
font_01_sfnt_off0000f60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60E 11104 bytes
SHA-256: 0da0187c2ccf93c5d20114c4c954cff7dda713dade90e865e999dc8c08fef28b