Malicious PDF — malware analysis report

Static analysis result for SHA-256 d27970026e48279f…

MALICIOUS

PDF

39.0 KB Created: 2020-11-07 03:44:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: d2bc21144813d2eefb5264595b29fb4b SHA-1: efd2c985c5d37add523b05e4009073d8a9b0eebc SHA-256: d27970026e48279fbd316c5a0e59af001cd7cc0b06177b1eca28f48bd4900301
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/123?keyword=is+christianity+a+religion+or+philosophy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378382/normal_5f9f0b96d753a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384296/normal_5f96bd418eeab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393644/normal_5f98087b6a4be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381528/normal_5f91713f60adf.pdfIn PDF document text
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/4556385.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383136/normal_5fa470fd775f2.pdfIn PDF document text
    • https://bawigadumifop.weebly.com/uploads/1/3/4/4/134494387/guruxadi_dejev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407788/normal_5f97959d518ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zomizekakigo.files.wordpress.com/2020/11/95145242562.pdfIn PDF document text
    • https://gonugatak.files.wordpress.com/2020/11/dsm_v_download_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2de2433b-3b51-49c4-a5de-f4a77c1b4c1a/xofur.pdfIn PDF document text
    • https://livesafaboz.files.wordpress.com/2020/11/43446739062.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_off00005934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5934 5232 bytes
SHA-256: bcd87a0b60a0fe911451d0b7b208fad0b5bf8f318171474cf921f18a0c628739
font_01_sfnt_off00006b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0D 10576 bytes
SHA-256: 5f2ad444179a03724471eccaadd23c5d0cbdcf6564b63800ef1019ea6e2e2d79