Malicious PDF — malware analysis report

Static analysis result for SHA-256 961251b9decf0d6d…

MALICIOUS

PDF

35.9 KB Created: 2020-10-11 01:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 457bd433d438ef5e5b481cff63095bf3 SHA-1: a66768d52ad9d465021f87579377b9213073e7a2 SHA-256: 961251b9decf0d6d73680fc58517caf5af521e89d7b540cae17f5174c36e79ab
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/strik?keyword=bow+of+eternal+frost In PDF document text
    • http://japexi.azautogalleryllc.com/uploads/1/3/1/1/131163930/jotofifumiliveg-kekuvilasezofo.pdfIn PDF document text
    • http://files.reorientedadvocacy.com/uploads/1/3/1/0/131070096/1389960.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://cdn.shopify.com/s/files/1/0482/2053/6989/files/teacup_poodle_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3225/9991/files/batalla_de_ayacucho.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0581/6227/files/nuxafup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9033/2834/files/fruit_loops_nutrition_facts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6213/0853/files/nisekaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9249/5521/files/high_top_tennis_shoes_amazon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5391/6053/files/wawele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5656/9247/files/42821798604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1927/9263/files/34871897705.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_off000042ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42ED 4640 bytes
SHA-256: 0b934fbd875ebc97847957db4126dd478795d118ef2bfb7935473d3f0de1f6e8
font_01_sfnt_off000052c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52C6 10064 bytes
SHA-256: 068da63980cd8df5d2042093012f1ab57cd2f88169dbe36a72bf214cecd4e7ff
font_02_sfnt_off00007543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7543 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2