Malicious PDF — malware analysis report

Static analysis result for SHA-256 c60d926968f0538c…

MALICIOUS

PDF

46.4 KB Created: 2020-10-13 17:12:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 39043c92911670db2cc2e37a5e487bb5 SHA-1: 1b426f6952f29ce24a607df5718cc95f170a99a0 SHA-256: c60d926968f0538cd142cb9421fb424d54faada7c84127437f5706291a909789
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/strik?keyword=anatomia+del+sistema+tegumentario+pdf In PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/d1ee3c84.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/bamudepekepa_setumazowido.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/a63fb.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/2a5b38eef3430.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1156/6491/files/naseba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1527/4147/files/gogopejuwaxazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1786/2809/files/57026539977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8846/5054/files/65830344929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9342/5316/files/chaldean_oracles_and_theurgy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0286/1989/files/sherwood_animal_clinic_in_beaumont.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3571/6503/files/63211173854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1229/1264/files/rukutoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7887/9899/files/ranesizejofudun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0697f6d-0233-4bda-8504-317df41a31d9/69396391578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47bf022a-f98a-449e-945a-30c85c85b525/nuwiwamupugoditi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e26f8954-79f4-4cd8-b8f9-1b70afe37ac4/betujixesesogugajurulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1729bd9f-fa2b-4224-9723-c57c04df7d52/xaburu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/046c03dc-da29-4c1f-aac4-07797950602c/1658422147.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7508 5348 bytes
SHA-256: 5ff428ab4debbd2ef844abbf87029609af12e6f8a6a58a083aa8161c954e816c
font_01_sfnt_off0000871d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x871D 10972 bytes
SHA-256: 6ad0cd63698f2f4316c9dc6757736b22c1899030a470e6e8863e1ab9d174888a

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