Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4df7b6d0bd698a6…

MALICIOUS

PDF

44.3 KB Created: 2020-10-28 08:57:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 7f6fa0fd193fd36dbd6e9c7ef77b6905 SHA-1: 247b3a12ab80834276f8233774717c4a6d948505 SHA-256: e4df7b6d0bd698a620ed08a878e0a74957c53094ba08606a98eafde9678507a6
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://cctraff.ru/pify?keyword=clash+of+clans+cheats+really+work In PDF document text
    • https://bazademirijef.weebly.com/uploads/1/3/4/4/134464354/vokolerawumateb.pdfIn PDF document text
    • https://segakimorepej.weebly.com/uploads/1/3/0/7/130738797/c0d8c11de0c2.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/11b10539.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006f1a.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006f1a.bin)
    • https://cdn.shopify.com/s/files/1/0497/8196/4961/files/columbia_county_dashboard.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1966/3522/files/98106477901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1791/6575/files/new_general_maths_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/rilitiw.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/aporofobia_libro_completo.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/cbse_2020_class_10_sample_papers_all_subjects_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/tuvig.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/tovilijirikunudepokoxit.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/tenses_active_and_passive_voice.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/historia_del_neoliberalismo.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/orthographic_projection_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/69128981257.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/45375322082.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/zuloturukevonekumuv.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/29850722977.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/sogar.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/body_parts_name_in_hindi_and_english.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 extracted file (font_00_sfnt_off00006f1a.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1A 5132 bytes
SHA-256: 8047fee0c526e61dddbd6b25b2ab0d0760972357f1be051fb773c894d4e85c75
font_01_sfnt_off00008097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8097 10244 bytes
SHA-256: 9665224de18a54855bb9c331eaa88941452b00854bc0df7892e8ef04081ebdcc