Malicious PDF — malware analysis report

Static analysis result for SHA-256 687f0d1b2bb411ae…

MALICIOUS

PDF

67.5 KB Created: 2020-11-11 00:45:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 49928cb35fec07d629710c3b8236d7a5 SHA-1: 3625a3c2399c70c0cdc4c79531cdca7b47e57488 SHA-256: 687f0d1b2bb411ae5243cacc792d2691fa2bc6b6f3fdc894cbf7e9e0a56e1d66
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/aws?keyword=minecraft+apk+mac+free In PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/migerolam_zapoxegowokid.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/samupekawi.pdfIn PDF document text
    • https://tumogifizutuvo.weebly.com/uploads/1/3/4/5/134527103/2602350.pdfIn PDF document text
    • https://xawiwewediwo.weebly.com/uploads/1/3/4/0/134017039/10046cec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_5f8d37db1216e.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/vesubodufisi/41830048086.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/27947338477.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/avatar_cologne_cheap.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/17738999006.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/auckland_transport_code_of_practice.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_off0000cc59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC59 5020 bytes
SHA-256: 49bb0458b91a299108a409bd55084052785a4efd78751456165923415d83f7c0
font_01_sfnt_off0000dd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6E 10616 bytes
SHA-256: 295db2cfeb4d7a50f4b530017ad4f8ca128c9d54f08f0d7250bda294cee91226