Malicious PDF — malware analysis report

Static analysis result for SHA-256 392acfe5a36e61d1…

MALICIOUS

PDF

47.3 KB Created: 2020-11-01 13:07:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 08ca1770cea3ebf93fc6ff0bab2ef96e SHA-1: d5e1e77dceffed4c18c4138c276c4b88caabee65 SHA-256: 392acfe5a36e61d19e67170841acd7dbe2efb10c545f07a9c2364bf2493a4a71
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/aws?keyword=manual+muscle+test+erector+spinae In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f93577cd031d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381104/normal_5f9e8534297e5.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/7682192.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/mibojos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385235/normal_5f9194ea06b21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/2019_calendar_lala_ramswaroop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9a0361e-1c1e-42c8-879e-ad537effbac7/wedanunisoja.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/7143686071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc2dae73-ad6a-4746-bc8f-68e3e04aef57/49108889817.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/33644632209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9333/7264/files/23171167355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9720/3894/files/62761992216.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_off0000766e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x766E 5084 bytes
SHA-256: fd747efdce107d66d6da73cd2de1a822dbde1307eae48aefb65905649b9b164a
font_01_sfnt_off000087ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87AE 12432 bytes
SHA-256: 2a5b0e38e9f35d2b0cfe510fbaa23a9f7b5b1b202a8341050ebe76b4282fcc9f