Malicious PDF — malware analysis report

Static analysis result for SHA-256 daac3bdc2957b586…

MALICIOUS

PDF

68.2 KB Created: 2021-02-09 13:32:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 601176dea704c02982028fdaf0512e9b SHA-1: c76eba124de02a6250ab8a4e0d068fe7ce023bc4 SHA-256: daac3bdc2957b586dcf5344e38280062acfe6fc71c68662bdc346a95c67bc90b
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://druttle.ru/wb?keyword=automatic%20fire%20suppression%20system%20pdf PDF link annotation
    • http://zerkalo-fugicar.website/knowledge_based_interview_questions_and_answers7v470.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/jdiarha/tetris_ultimate_ps_vita.pdfIn PDF document text
    • https://cdn.sqhk.co/buxifuludo/egigg8d/89985731832.pdfIn PDF document text
    • https://cdn.sqhk.co/rotexopapi/igjjhfH/hack_beach_buggy_racing_2_mod_apk.pdfIn PDF document text
    • https://varusotefus.weebly.com/uploads/1/3/1/3/131398431/2185839.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/tegfRhi/runibakubafowelenuraxipi.pdfIn PDF document text
    • http://jidobefom.iblogger.org/backflip_madness_game_for_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jegajumofi.rf.gd/fanny_mendelssohn_string_quartet_sheet_music.pdfIn PDF document text
    • http://bawavejukedosuv.epizy.com/xigoxevirokazejekemalibu.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/wurisudamo.pdfIn PDF document text
    • http://makibiwediwanov.rf.gd/89170403139.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/45246700863.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/34414378796.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/naxobaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/doena_de_chagas_sintomas.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_off0000ce2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2A 5360 bytes
SHA-256: a6863f4ab100c3fa02a51492f1e2e9aa9b9e688170d5429d08ba104c619ed5e5
font_01_sfnt_off0000e05a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05A 10432 bytes
SHA-256: 3a71a3995b1490f9bfa2fa5e511cd2bbb3b9f9b78a363f27b96217e4d90f5168