Malicious PDF — malware analysis report

Static analysis result for SHA-256 016a84a3a1258392…

MALICIOUS

PDF

37.3 KB Created: 2020-10-26 11:52:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: a796e2eba1094bf97bb8304d55d1ec9b SHA-1: a0b001fba789bf12d8598a4a03ab0c68d12b57e9 SHA-256: 016a84a3a1258392a34b66f11218d40a419ae16593a5146a0ad85564d37c9d85
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=cruse+da+1986+lexical+semantics+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372673/normal_5f88b3ae45952.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391921/normal_5f8e10b1a106c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f86f63942934.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://uploads.strikinglycdn.com/files/544a5070-f9da-45b1-9469-a4c15048219b/xarevowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8671/2484/files/58534929094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8907/0747/files/chicken_farm_minecraft_bedrock.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6134/4406/files/baranetadudodapagenesaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9933/2516/files/lesson_6.5_practice_a_geometry_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5806/8136/files/govenubep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1465/1541/files/25271196495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7588/7802/files/existentialism_absurdism_nihilism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7481/8726/files/pokemon_counter_attack_game_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/menafovuvunesovudegena.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/tubeboveparizanamoja.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/11557671288.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/60863997422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c084868-5f83-4813-9bac-676c63228205/pemipenum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d937f9-831f-4fd5-bc5e-a180280a4856/54926284221.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8fa9020-e693-42cb-ad20-7ad48249fb41/mini_donkey_for_sale_indiana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cae6d8a-3974-4eb8-ab0e-89d3db406275/plant_paradox_recipes.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_off00004998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4998 5720 bytes
SHA-256: 4f8576721570d764f6cc2a8734f36d044a4eef5bc3b11ae3faebf95ebfd080dc
font_01_sfnt_off00005cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF7 8484 bytes
SHA-256: 811ef23d3664bfd37a40ce44cbfba734b799a0e65b633f6a9d9219cc1a13ecd4
font_02_sfnt_off000079ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79AD 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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