Malicious PDF — malware analysis report

Static analysis result for SHA-256 3098a37a9a315803…

MALICIOUS

PDF

47.5 KB Created: 2020-10-25 08:47:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: bc1dfa443e9e942958ae878053a807b6 SHA-1: 99339f44d2e6e869da215e182a80cade3789906e SHA-256: 3098a37a9a315803b0004ef30f9a6e3fc5fc20bbb1c947d6638586aafe8715a8
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/aws?keyword=alternating+current+machines+mg+say+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403537/normal_5f929d357acd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373261/normal_5f945fbf40691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5f891ecf8dfbc.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006963.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006963.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000a21c.bin)
    • https://s3.amazonaws.com/jivuxo/natasaro.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/snacks_recipes_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/pijafifovepoketidij.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/arcangel_miguel_ayudame.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/patofisiologi_atresia_ani.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/73938210194.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/car_alternator_circuit_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2772/5995/files/vintage_floral_paper_plates_and_napkins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8081/0136/files/830_credit_score_mortgage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2783/2221/files/expense_reimbursement_form_doc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0345/1813/files/sales_representative_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4080/2469/files/wifuviniroz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5946/8701/files/best_guns_games_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/gokagetibatolanerimami.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/jolly_phonics_big_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/29708567423.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/bitibepikuvovuzile.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_off00006963.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6963 5432 bytes
SHA-256: 46de57ac50ae6dedb3ff7acbcf03dd36aa3b979fc80a72c040a68229622586f9
font_01_sfnt_off00007baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAF 11444 bytes
SHA-256: 5aef317665333006be53ea7326f9bc6b6add867a9671c657c746df3e86417772
font_02_sfnt_off0000a21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA21C 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3