Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad95f334811da6ad…

MALICIOUS

PDF

71.2 KB Created: 2021-03-01 16:32:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d7ed9e7914696d997b48fd97304c0309 SHA-1: d5a818ad9d6a347dbe18081bf7f8f5c140a64990 SHA-256: ad95f334811da6ad992980d0fc503d3038e77a58e932cf5c34c9608e0d934581
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=vizio+e60-c3+weight In PDF document text
    • http://tipatav.22web.org/fimewexowogesoni.pdfIn PDF document text
    • http://nakalabaxis.mywebcommunity.org/learn_english_through_story_subtitles_english_level_4.pdfIn PDF document text
    • https://figiroxofidun.weebly.com/uploads/1/3/0/7/130740151/9884730.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/r12_to_r134_conversion_kit.pdfIn PDF document text
    • http://dapajurop.mygamesonline.org/japanese_grammar_exercises_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493553/normal_5fdb08bad22df.pdfIn PDF document text
    • https://pivorexivasij.weebly.com/uploads/1/3/4/4/134489734/xotabafopivaka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sodebaxekigefip.rf.gd/coleman_furnace_error_code_8.pdfIn PDF document text
    • http://ziwilud.epizy.com/best_math_solver_app_for_android.pdfIn PDF document text
    • http://xogimutidum.epizy.com/auditing_and_assurance_services_aasmund_eilifsen.pdfIn PDF document text
    • http://tesunujazo.epizy.com/58529856904.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/zuligamizenimukoji.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/audiosurf_full_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/insuficiencia_cardiaca_aguda_fisiopatologia.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/ginger_snaps_imdb_parents_guide.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_off0000d9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A5 5144 bytes
SHA-256: f44c309a433ee177c4ee83c0f883bc3d000953c4ee851a428bc81782c6e3f2db
font_01_sfnt_off0000eb57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB57 10860 bytes
SHA-256: a15bd25f93594c2a0279fae54414431ac277078a51d8b057681bcacec06d8488