Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec81d16e7ae58620…

MALICIOUS

PDF

34.9 KB Created: 2020-10-04 23:51:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: bf893b03f21210cfe5ab27eeec1e8f4c SHA-1: f2d9a5a5945ad2b83431c903e1fb2110b5360534 SHA-256: ec81d16e7ae586205a784667763a8a14d0d7a04cc5198b893477944b026a293e
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://ttraff.club/pify?keyword=veronika+decide+morir+pdf+google+drive In PDF document text
    • https://site-1036711.mozfiles.com/files/1036711/gason.pdfIn PDF document text
    • http://zidige.crackodawnfarm.com/uploads/1/3/0/7/130739284/siloxitigiru.pdfIn PDF document text
    • http://files.swissmobileveterinaryclinic.com/uploads/1/3/0/7/130775970/8210092.pdfIn PDF document text
    • http://files.contracostachristianschools.org/uploads/1/3/1/3/131379434/dovexazipurinab.pdfIn PDF document text
    • http://gurejo.ageofwarbotica.com/uploads/1/3/2/3/132302963/d7c081ee6f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dee9d90-4107-4289-a471-4b536b3a954a/74626780284.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0801eac-ba2a-4497-8ef8-6b33f3716ba3/vekese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4adf167-e116-4d6d-bcb4-32e576aa6b7d/31580715526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3518e6a-684e-454b-9d32-ec3db8f0e6bb/25031304234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef816364-0daf-4b9a-8483-2ab62a01308a/20972107718.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_off00004b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B9E 5384 bytes
SHA-256: 4ab7d4d481a66765df11bb4571bc6d37a3df0208f7d9a1d7a4230946d341a343
font_01_sfnt_off00005def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEF 9784 bytes
SHA-256: 59d879a49f0440b415f947352138c48a26442c89f8210fc1d90311f56b972691