Malicious PDF — malware analysis report

Static analysis result for SHA-256 280a26c713cf4196…

MALICIOUS

PDF

69.6 KB Created: 2021-02-24 10:39:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 97a43e4ac6d95a31158ebca970862299 SHA-1: 8dba0ee1492b8a156f1c63329ac79428273e5dc1 SHA-256: 280a26c713cf4196fe76d6e26013c3995bfb98c6c8568c5d958615630ff039e8
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=toastmaster+cc+manual+pdf PDF link annotation
    • http://povar2020.site/black_and_decker_electric_weed_eater_gh1100_manualyvxbb.pdfIn PDF document text
    • https://sobixalotebi.weebly.com/uploads/1/3/4/0/134017917/vinebepapowawora.pdfIn PDF document text
    • https://cdn.sqhk.co/runetonorox/dZbihTi/download_hero_strike_3d_mod_apk.pdfIn PDF document text
    • https://nelinijamewugin.weebly.com/uploads/1/3/1/0/131070382/0f7e474.pdfIn PDF document text
    • https://cdn.sqhk.co/nepelusir/gjhhggc/border_force_officer_salary_australia.pdfIn PDF document text
    • https://voloxamofe.weebly.com/uploads/1/3/0/8/130874475/f21d3121.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471690/normal_5fd0fa51f28cf.pdfIn PDF document text
    • https://cdn.sqhk.co/rureroso/Vqihfji/amaze_game_level_102.pdfIn PDF document text
    • https://nobakunifiximup.weebly.com/uploads/1/3/5/3/135310199/juzad-tixiwogogafopa.pdfIn PDF document text
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/37fcb800.pdfIn PDF document text
    • https://dodilepu.weebly.com/uploads/1/3/4/4/134444379/jigaku.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/vavapekadoliti/31063101268.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/ipcc_report_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/wifi_hotspot_software_for_laptop_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/optimist_mainsheet_bridle.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/canon_pixma_mg3500_printer_manual.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_off0000d451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD451 5248 bytes
SHA-256: 896cfd2f164d46946fab3331ca4a7f34f6a8c74a80a2186e7dc59884583db390
font_01_sfnt_off0000e614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE614 10228 bytes
SHA-256: fc0b26df72fd5012c3f0df6faad82f62ac7077891d7790289c3a1c56f41a8b70