Malicious PDF — malware analysis report

Static analysis result for SHA-256 1613ef6a3fcd80d8…

MALICIOUS

PDF

43.2 KB Created: 2020-10-16 16:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1b3fc52bde7dda8590076135ce9ebb59 SHA-1: 2c2aa306ac33696b38a1ab95b7fdd1975cde2bc5 SHA-256: 1613ef6a3fcd80d83a5cf4a482a7e6c8cebcb32e97ac2098551f04538f9aab74
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://ttraff.cc/123?keyword=league+of+legends+wild+rift+brazil+apk In PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/d74a5f40.pdfIn PDF document text
    • https://duxixujojive.weebly.com/uploads/1/3/0/7/130739103/c2e5fb8.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/9b53ec72f.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/5004881168e06.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/sunogawo_xifenosa_fuvomovonerefi_badawezaliromi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5c4b05a-47ed-44cf-8c2e-787fba62d0fa/26689626557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3427b237-4714-4f63-bfb1-5da73530d4d9/50448536763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4051e97d-3569-422f-895c-0b33a60ac129/36218752192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a33062d-393a-490d-a47a-aaf7a5072a57/6604823611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16f7da28-f519-4f21-9bf5-f5d341c8bfd8/wagum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/937f1da8-bb49-4410-88bb-32c07f5e9405/5596704503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/7743/6060/files/rinutimevesugolov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/is_garlic_a_vegetable_or_a_spice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3433/6670/files/zorifoleli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6553/6412/files/wipodenozaxef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0831/7850/files/xavukadinuvebagaxeso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4fc4f7a-8565-4fe0-9995-066e6144ad55/70361796798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/662d8c97-ea0b-4603-8bf8-3ec96253c95d/81944047713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2384a799-6f30-47ab-ac5e-44c3119d31ab/zizulubolesexawenuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8783346c-e8ef-4952-9ab2-786d0c27520f/27561519322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3396d9be-45dd-4a78-94f9-b78d713de95c/58225607518.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_off00006934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6934 5496 bytes
SHA-256: 030f9c99ffd47c7179c1608097fcda5315203e8274f22e688e3527b125257f8c
font_01_sfnt_off00007c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1A 10160 bytes
SHA-256: 457f6f7a152075e44d5a636ebb1de0b7104bed8e7dff3d6ed0198fd675bea718

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