Malicious PDF — malware analysis report

Static analysis result for SHA-256 71e008a44e65ce78…

MALICIOUS

PDF

45.9 KB Created: 2020-10-27 06:09:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 36a917c17726df069d8b02bf90470473 SHA-1: 79362c9035fdafd08170763a3a0e1be1f97a8464 SHA-256: 71e008a44e65ce78c0228980469cd46c30307679ccfd2c895fb67570ea6e3e51
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=aquatic+center+hours+idaho+falls In PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/rinozeleb.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007060.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007060.bin)
    • https://s3.amazonaws.com/dugibabafod/virorakexereg.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/935374703.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/latin_america_map_blank.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/tugugoviwugovufosamisen.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/telugu_reference_bible_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/blessure_de_trahison.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/86603688550.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/accounting_concepts_and_conventions_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/6978687977.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/30272209851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7355/8935/files/congenital_hand_deformities.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2118/6718/files/19843964766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/fadolefiribedib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8171/files/pentair_320_filter_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5916/2521/files/democracy_and_education_dewey.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/lajelaw.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/human_anatomy_book_bd_chaurasia.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/bodexatujuxawelij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed7e91eb-36da-4f40-8ff4-3125ca02cc58/salt._nayyirah_waheed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e90de048-8437-4866-a172-9c2e33146fd3/spin_to_sing_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd7fcb7-91f5-48bb-b016-0104e0d8dff6/radio_shack_33-280.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_off00007060.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7060 5224 bytes
SHA-256: 93713579e22bfbeb66fd904ec921e40017e3c7d5cf25778cca3a0bbca95fafaf
font_01_sfnt_off00008212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8212 11508 bytes
SHA-256: 81e475ab51e6eb65aa6345367b3e01c6b1f14e67ca14ce3fda685b040e73a7c5