Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc550851cae00a47…

MALICIOUS

PDF

74.2 KB Created: 2021-02-24 17:21:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 732f5e8742974754c0b2a1c194952b2b SHA-1: 7876458be961797767d30b5cdde1b3f0dda73a1f SHA-256: cc550851cae00a472304c9e3977a7037ae339b14e669306b16b1242cc0e05a83
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://maypoin.ru/wix?keyword=hotspot+shield+cracked+apk+2020 PDF link annotation
    • http://wedipum.mygamesonline.org/how_long_does_navy_training_last_in_nigeria.pdfIn PDF document text
    • https://lubikumak.weebly.com/uploads/1/3/1/4/131453733/mupopimimojif_duxituxaxis.pdfIn PDF document text
    • https://xokiguju.weebly.com/uploads/1/3/4/6/134679394/gomek.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/how_to_get_google_maps_to_update_street_view.pdfIn PDF document text
    • https://wifenawejiwatu.weebly.com/uploads/1/3/4/8/134879118/64d6517d88b3.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/vizio_e320vl_remote_app.pdfIn PDF document text
    • https://witetalujoloxof.weebly.com/uploads/1/3/0/7/130740434/4d52e9.pdfIn PDF document text
    • http://numulul.mygamesonline.org/is_it_bad_to_wake_up_crying_from_a_dream.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/zupenafud/31184548831.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/veroradodaramuk.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/gobewasivaga.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/what_size_battery_for_2008_dodge_avenger.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/46715583752.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/44989420680.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/bomorixufuve.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_off0000e5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DD 5460 bytes
SHA-256: 02fa24499e93f6793c934bcb4cd3c86159829a79c33065aa23a8e28f8df39116
font_01_sfnt_off0000f866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF866 10424 bytes
SHA-256: 1bed7f62983d4baec83676dec47740f71a83ed339a8712b2f7b70edeb65be490