Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba30cc26cadcd53…

MALICIOUS

PDF

47.9 KB Created: 2020-10-26 22:29:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: e0570d966d0c454bf484bbb7babb0a09 SHA-1: 96b9b86b4fb136c71ddf14a5ca107ae25b66044e SHA-256: 8ba30cc26cadcd53c6c73be13e00d02381c70bdad7a071d77bc4e9071fd00a8b
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://ttraff.link/123?keyword=jon+bowzer+bauman In PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/lazogefowibupudadume.pdfIn PDF document text
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/643267e886c2.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/narisatesepujiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007088.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007088.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000a44f.bin)
    • https://s3.amazonaws.com/jedaxopopuko/nfhs_basketball_rules_book_2018-_19.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/1_goal_free_education_for_all.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/nejepis.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/surah_baqarah_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/sociologa_que_es.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/alphabet_handwriting_practice_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/vivune.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/gerelujelawus.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/69398255682.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/bsc_1_year_inorganic_chemistry_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3431/2356/files/19530294189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6284/5336/files/free_winter_backgrounds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6353/6535/files/hough_high_school_athletics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/2165/3918/files/rajoniw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6796/3557/files/dot_plot_data_distribution_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1021/2518/files/electronegativity_and_polarity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5240/8218/files/54803895284.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1485/2255/files/die_verwandlung_graphic_novel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0314/9479/files/hypemaster_playbook_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3673/7177/files/3335001494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4883/6513/files/votokenupelodolef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8391/5962/files/netis_e1_manual_portugues.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_off00007088.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7088 4644 bytes
SHA-256: 2591b6b721449d32b3c7e55fab5b97cef544637d905b634defdebd17aa60cfee
font_01_sfnt_off00008040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8040 10540 bytes
SHA-256: c4d218054a7afddbbde476f2863d67e63f01cbc153c9d6b5835dcd5e267b8dc8
font_02_sfnt_off0000a44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA44F 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71