Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a61279bb68fc3a9…

MALICIOUS

PDF

69.2 KB Created: 2021-02-15 00:59:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: daaefea2fb204316ccf108a3dc9d244a SHA-1: 60fa265ff494665537db1f743848708df32fe6ea SHA-256: 3a61279bb68fc3a9f43d9d2353fd3faffcdda96556001841dfb897e00e28d740
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://jacksth.ru/123?utm_term=766+credit+score PDF link annotation
    • https://cdn.sqhk.co/kolazapikib/eiilHDA/wildlife_rescue_brick_nj.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxevabuvix/fAgeqZI/buwosejavot.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/gjHhajf/fishing_simulator_desert_island_quest.pdfIn PDF document text
    • https://cdn.sqhk.co/waxigapo/Ohhtjjf/22983369490.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/hdphljf/rwby_silver_eyes_god_of_light.pdfIn PDF document text
    • https://zulunapakaf.weebly.com/uploads/1/3/1/0/131070820/9986695.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvuwisarov/haUajih/46094851629.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/ifTiahi/how_to_make_bacon_wrapped_asparagus_oven.pdfIn PDF document text
    • https://cdn.sqhk.co/fukafodifi/qjagifN/bass_booster_for_pc_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kelulegawi/vEeOjdR/off_road_racing_series.pdfIn PDF document text
    • https://vinofuloro.weebly.com/uploads/1/3/4/8/134850824/34dd04c0b46201a.pdfIn PDF document text
    • https://lodotimafigu.weebly.com/uploads/1/3/5/9/135981467/wujeremesex_jepadepixezomi_jenifujorilaxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lafasusatar.rf.gd/foreign_exchange_risk_management_policy_template.pdfIn PDF document text
    • http://funuduki.rf.gd/bose_soundlink_color_11_manual.pdfIn PDF document text
    • http://zavujosabojid.rf.gd/anthem_chapter_1_worksheet_answers.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_off0000d296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD296 4828 bytes
SHA-256: e27e278d624dd0f4ea94d8981b78131144ec5fe921e4f7b270ad8410315244d4
font_01_sfnt_off0000e317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE317 10972 bytes
SHA-256: db2a4576e911a52dc59e991774ceb02e970482ecb8b8432070592d8d4bb577ca