Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4d5ad53ebfee8f3…

MALICIOUS

PDF

69.2 KB Created: 2021-01-27 18:50:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fffbf376874c61fa643aa84fbb057831 SHA-1: e13eaeb6da1ad6dedf2fbfa56f539f1945daa725 SHA-256: f4d5ad53ebfee8f33343533e1661fe5dff68c0f77f112121fcf09179a9d1c180
254 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
  • 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://crophysi.ru/wb?keyword=dj%20marshmello%20fortnite%20cake In PDF document text
    • http://liko-sneakers.com/nicki_minaj_height_in_feetjat37.pdfIn PDF document text
    • http://kokofiru.22web.org/awara_bengali_full_movie_hd_free.pdfIn PDF document text
    • http://fakaripeti.xyz/noun_clauses_subjects_objects_and_complements_exercises33jx4.pdfIn PDF document text
    • http://casbah2point0.com/major_mayhem_2_mod_apk_homea92nw.pdfIn PDF document text
    • http://prizinsta.online/us_history_subject_test_practicew7mdd.pdfIn PDF document text
    • http://kovemiwixipogaf.66ghz.com/zaradusetuzunikuwazegubi.pdfIn PDF document text
    • https://dadojunolibete.weebly.com/uploads/1/3/2/6/132683289/5475281.pdfIn PDF document text
    • http://zetomanebegox.iblogger.org/english_grammar_articles_exercises_with_answers.pdfIn PDF document text
    • http://uchebnoe.website/minecraft_zombie_survival_mini_game_server6zg4c.pdfIn PDF document text
    • http://ifeelgood.club/starz_encore_black_east_schedule6w61p.pdfIn PDF document text
    • http://sberin.xyz/53700775795w1ai1.pdfIn PDF document text
    • http://onlyforyou.space/derwent_watercolor_pencils_individualqhnlv.pdfIn PDF document text
    • http://fortuneocredit.com/36308373095kwxdz.pdfIn PDF document text
    • http://3gusevshop.website/gazekosesixox4hzcl.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/dazemi/alexander_movie_dual_audio_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/86089277699.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/genetic_algorithm_uniform_crossover_example.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/5310891144.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_off0000d1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A7 5260 bytes
SHA-256: 8fa92b751fa3f42260f4899e4969ce7c18773e7cf6cae6dd04c12e35a1e2045e
font_01_sfnt_off0000e366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE366 10620 bytes
SHA-256: e752bab875b4361eb9003caf2a804e53b0e5c4bb54ee49b94dd406d712059574