Malicious PDF — malware analysis report

Static analysis result for SHA-256 b10165ec0f11c114…

MALICIOUS

PDF

61.4 KB Created: 2021-02-22 13:46:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a5daca0e9151474e96ca79f3e0016735 SHA-1: a72873f978a23c255dbd07119203952bf190ab6b SHA-256: b10165ec0f11c1147987511aa05f556150b406377af4934119d53f6eb47cf431
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/wix?keyword=lisd+calendar+2020-21+lubbock PDF link annotation
    • https://cdn.sqhk.co/vumivatuvi/dTshaie/true_football_manager_mod_apk.pdfIn PDF document text
    • https://titobabedax.weebly.com/uploads/1/3/4/3/134317276/duxamape.pdfIn PDF document text
    • https://rolugoxeve.weebly.com/uploads/1/3/1/3/131380951/b8f4cc6.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/eG05hcx/world_cup_2018_bracket.pdfIn PDF document text
    • https://finiruxadaral.weebly.com/uploads/1/3/2/6/132680938/joxofexubogug.pdfIn PDF document text
    • https://faxipanonuk.weebly.com/uploads/1/3/4/3/134352952/lalajixo.pdfIn PDF document text
    • https://cdn.sqhk.co/tononapiwaso/hjhc8Yu/20738305649.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/eiggijd/36762183594.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/sevoga/defying_gravity_duet_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/21549235629.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/boca_do_inferno_livro.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/cover_letter_template_google_docs_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/vande_mataram_lyrics_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/dell_xps_15_9570_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/peduxezixoko.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_off0000b386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB386 5436 bytes
SHA-256: 7d53831aa9f93366c7902d4251ba65742fcb2537374d06be4b3ada32c164c071
font_01_sfnt_off0000c61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC61A 10028 bytes
SHA-256: 91f94faa0c2423690e596c853bfea19bcaf41c716d88a1ce8fdf35ed47f06c26