Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9d5f8d05c1df49d…

MALICIOUS

PDF

71.4 KB Created: 2021-02-11 04:21:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 44fd747de1e2635dfd2f7863ab4228ef SHA-1: 947c36a89bde4b97e79435b6426f75ab9fad0a4d SHA-256: d9d5f8d05c1df49d9e6fbc1b8cbb419455c8563fd7cd4b40d5df3834d2366026
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wb?keyword=heartworm%20society%20canine%20guidelines PDF link annotation
    • https://cdn.sqhk.co/xafiguzi/gghgeIO/lemonade_recipes_without_sugar.pdfIn PDF document text
    • https://gitumakiwu.weebly.com/uploads/1/3/1/4/131437138/4530626.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/ghofxjd/mechanical_energy_calculator.pdfIn PDF document text
    • http://detonic-deutschland.website/jet_games_free_for_pc398gp.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxinugad/hajeNjb/highspeed_highway_traffic_rider_3d_racing_game_download.pdfIn PDF document text
    • http://dkblogin-de.best/nawipagivaxowadajawesarerb4znj.pdfIn PDF document text
    • https://kupujusurigov.weebly.com/uploads/1/3/4/4/134471221/kuwuxuguvijo-jovanozow-meruxixasup.pdfIn PDF document text
    • https://satizivuzaked.weebly.com/uploads/1/3/4/3/134383512/sipub.pdfIn PDF document text
    • https://muwegejise.weebly.com/uploads/1/3/4/2/134265646/likexa.pdfIn PDF document text
    • http://lidlid.xyz/witcher_3_eternal_fire5ds2h.pdfIn PDF document text
    • http://tizezs.xyz/378076832203cxfj.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/lusabifef/chrysanth_cheque_printing_software.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/74655529426.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/steam_ark_survival_size.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/block_ads_chrome_android_root.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_off0000da28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA28 5416 bytes
SHA-256: 54fc561dfe63b245b2d965ba60ab4f1c1384fd8f71418d004cee661df8a4a485
font_01_sfnt_off0000ec92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC92 10464 bytes
SHA-256: 7445ce68d37018306427f82d596f87b03fc0af230fc1e8c6747e291d200e494e