Malicious PDF — malware analysis report

Static analysis result for SHA-256 904e5a5a1ccc1f11…

MALICIOUS

PDF

43.0 KB Created: 2020-10-30 08:26:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 710a13cabcc6f23a6ff687283172c81f SHA-1: 63abd93ccc2661ac4068afa69f47f22471294295 SHA-256: 904e5a5a1ccc1f11e0f2d93b68b0a25831df6351a61cebf6cc4f9882baacbba9
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=elkay+ezh20+parts+manual In PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/zixivatowa_dasunifap_rimubazoka.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/2166863.pdfIn PDF document text
    • https://taruzabob.weebly.com/uploads/1/3/4/4/134493447/2782875.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/filipefoxo_wuzivon.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000069cb.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000069cb.bin)
    • https://s3.amazonaws.com/fuwenoxuzasila/8x8_pop_up_canopy_tent.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/93508452933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/6068/8537/files/sulasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8884/5231/files/73519290043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9315/0875/files/67359450796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/4487/7462/files/multiplying_negative_numbers_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/minecraft_pe_14.1_apk_android_oyun_club.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7257/8244/files/getumufez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8437/2886/files/bachelor_of_health_science_usyd_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1508/5473/files/suriwujejerimuzopove.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/ribbons_down_my_back_sheet_music.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_off000069cb.bin)

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69CB 5508 bytes
SHA-256: 114929b7138a0d9615750080b8d322bd201513897b432a99d14a3545d96d231d
font_01_sfnt_off00007c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6A 10104 bytes
SHA-256: c311a95b1be14382140bf2dd76eb0d88295f6d7df235e05c81e3c6b7ed4c1ced

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