Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6bd8593d48db3e3…

MALICIOUS

PDF

56.7 KB Created: 2020-10-16 13:30:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 36a8d96ec7d838828cd8bb6d816b7069 SHA-1: 2499877ac24c13810a3d3ec23a04bec3dd49d0bc SHA-256: e6bd8593d48db3e3fc3fb8749b4f5bb76ba9b15cbc6cd4b67dd47ffe846bd4bf
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/123?keyword=triangulos+congruentes+ejercicios+resueltos+pdf In PDF document text
    • https://meporolokiso.weebly.com/uploads/1/3/2/6/132681401/5471893.pdfIn PDF document text
    • https://buxivadoga.weebly.com/uploads/1/3/0/7/130740323/de3084f.pdfIn PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/xadipaki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f873ad1dca2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371790/normal_5f88ff9d43adb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_5f87c4e96d4ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370269/normal_5f890dd4cd3e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370319/normal_5f89664a3100a.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/7c6605c7-d727-4fe3-9e27-e8d87f48aaf2/15183600836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6b16826-5853-4580-a9b5-8a277ce6c35b/44848249740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5894dfa3-e614-433b-b441-7bbca29d9baf/wunamemanaretimefadosog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7427855c-fd81-4949-a39a-dcaf95ee926a/15278688327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2494/0708/files/texas_driver_license_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/1000/5658/files/nayaug_elementary_school_rating.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/0891/3319/files/sasexuzomivujifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5161/3336/files/bakujezofunerexilaxaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1478/5704/files/gavoge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8177/5287/files/tinarirodebege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2627/5240/files/coal_gasification_process.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bcf7c1a-9c9c-402b-83f8-2089c2d7595a/9772202644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c73679b-21ba-41e5-959b-6fda8f0828fc/58224244996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/063032c0-1d68-4769-b923-b47457040655/74271922525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6285594d-2861-472a-891e-51fd8597e1ca/kajodedutuvel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d440c73f-403f-4e5e-bcd3-fbe48a06eaa8/62038271643.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000703b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x703B 2540 bytes
SHA-256: 1538bff6903a2ba10c85fc2e35d71c98e171109fde179a50bda2e5c6dc584e91
font_01_sfnt_off00007b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B77 5348 bytes
SHA-256: fc1fe6a6cc1e1dd131e09b3e3e416af8f9db1b3db80d0656e8a05ca974611792
font_02_sfnt_off00008db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB4 15652 bytes
SHA-256: 7a263292a744c653b60c270fd19eee03bcf0486cbee62052f4cb0e03eaf175f4
font_03_sfnt_off0000bd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD4A 16132 bytes
SHA-256: 6820151f9a4816bccc9e85e605aef44ce22c8924dfcccd161584754f275bf028

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