Malicious PDF — malware analysis report

Static analysis result for SHA-256 8269cee70a523ea1…

MALICIOUS

PDF

53.0 KB Created: 2020-11-02 00:54:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4f23acf1bea1bdc667d168ed4b3fd276 SHA-1: c02c7ac7fe907b04d9286c51bf96d376a2a59778 SHA-256: 8269cee70a523ea168da5d23ca29c06d3959c69a71470679705cc0ac30f184ec
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://gettraff.ru/aws?keyword=unlocked+gta+5+mods In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f871de25c32b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370066/normal_5f8d6255dfbe2.pdfIn PDF document text
    • https://gijepeparo.weebly.com/uploads/1/3/4/3/134318767/dojexefa_gawefifox_dorofu_nobes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374196/normal_5f8bd4353ca0e.pdfIn PDF document text
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/5106608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379241/normal_5f95f7b324dc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403556/normal_5f918558e886a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403422/normal_5f98869e5b3e4.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/fd8a85aa-df31-4774-b6c2-66beed3181b3/bojufejupagidazoris.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1841d27b-3a9b-4bd1-8bac-0d338d13bac1/jufovumuwezojifujax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27262867-a785-4a6b-9960-d00e2994bd50/finerotowukolitap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0019/0917/files/tenses_worksheet_for_grade_9_cbse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c022081c-e100-4eee-a29c-33fea41a7aac/46575637172.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5730/8063/files/2115957112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa1bdb0-4ca2-4a74-921a-c15e9dd66462/nidixezukifilakozixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8e5a0d0-0e95-44ac-84b7-ed1638ce74fc/99565549700.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_off00008320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8320 5084 bytes
SHA-256: 7de92adaec72b887ea1f3dcf85c51d19a8f65f83d3b73aa85eeace7494f8065a
font_01_sfnt_off0000945f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x945F 11112 bytes
SHA-256: 1382439b96af1667d3d722d83cf2e95d53b199694a18e45164bc435822c5ec25
font_02_sfnt_off0000b923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB923 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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