Malicious PDF — malware analysis report

Static analysis result for SHA-256 100e6f5bbae9f797…

MALICIOUS

PDF

38.7 KB Created: 2020-10-19 00:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 290256d68284db704f40c534aa8f1dc5 SHA-1: a904a774efb6864968b74633d2e3fc314d160dcb SHA-256: 100e6f5bbae9f7971e3c8b5b3f9ddc1f34516e0b0e6b7b241abf7755bcd34f66
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://ggtraff.ru/123?keyword=neo+geo+emu+apkpure In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5f8a0aafcafc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f88168703fce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f8b5cffd6f9a.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/zelujiniv-zebuzegej-dekebowiso-rukuxedi.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/larurozinuko-jasiwopima.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/dbf85.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/16adb065a5c8a.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/b5ad81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f87143010545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367290/normal_5f88fc8a63e92.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/1/0435/3412/3157/files/56716633789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9153/5018/files/codex_space_marines_2020_vk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4506/7684/files/the_law_of_multiple_proportions_is_illustrated_by_the_two_compounds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0470/9029/files/79503204900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4115/9333/files/pukumibeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0008013-a247-4ac9-b8ae-31304b8fbe99/korean_workbook_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78eee490-0106-4bd2-a0bf-3a455d752841/93366906845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f909a06-7c3b-43d3-adf0-b7ca9b7973e9/76953281971.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cb19c9a-7135-45d9-935d-2c647677c13d/fijasefawezedoretuwakow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5289/8739/files/kendig._enfermedades_respiratorias_en_nios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9664/4016/files/vaxuxavaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9183/6571/files/85485203810.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0070/1343/files/jepen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3393/1171/files/shiva_namaskaratha_mantra.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_off0000598e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x598E 4964 bytes
SHA-256: c60bebb2d1f78867c773a276f40a79d65179928c308c387162b2621ce8a84d63
font_01_sfnt_off00006a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6D 10288 bytes
SHA-256: 75fb65f350539613bdfd9747c8af4bcd52cc342c4f58aaec7a1b4c71fc9b553c