Malicious PDF — malware analysis report

Static analysis result for SHA-256 d41a43eeff21670c…

MALICIOUS

PDF

54.0 KB Created: 2020-10-21 15:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 9319b59a7de181386d11618f0909d5e4 SHA-1: 0dc3c30962ae6676b4384bed5b71a348e3fed724 SHA-256: d41a43eeff21670ce08ea3411c1f0f634e91c0ca0e48c49c3ea99b05f76d4c18
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://gettraff.ru/123?keyword=el+adjetivo+en+espa%25C3%25B1ol+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374368/normal_5f891e038122d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_5f8c6df81d6b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/leguvefu/19313302195.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/jolibu.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/vewefiw.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/blood_relation_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1819/7398/files/wisofewogevexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7203/1382/files/akribos_xxiv_watches_price_in_india.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8317/9184/files/miboji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9053/7373/files/derecho_individual_del_trabajo_unam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/pokemon_tcg_banlist.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/jipemejofopifufem.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/72101251551.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/bizizenaxevija.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/citalopram_celexa_davis.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/69012694846.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/zoguwekiponanotikis.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/autogenous_shrinkage_of_concrete.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/mekujefakizamekuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/ruzevemarugubina.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/4025307164.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/29008909471.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/janigusebidasodogodukodox.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E4 5032 bytes
SHA-256: d999768d853890f4931c8c415c730427d8e0e48495c82fa446b1b195daae0ec7
font_01_sfnt_off000094db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94DB 11448 bytes
SHA-256: 524efb52a2ff7ec22ccbeb86534d1b2af2dbdb947b36cac0278bcdb8fa8d7a4f
font_02_sfnt_off0000ba28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA28 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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