Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c8cb0487d641b41…

MALICIOUS

PDF

49.0 KB Created: 2020-11-04 15:53:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ecde8602caabd1eb8645da87923f1aeb SHA-1: 3f3caab86269c3bae7bc5853c20f4a387f212b54 SHA-256: 0c8cb0487d641b41957abdc70a7fe5d7128aa47be764b5c87cca476803805652
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://gettraff.ru/aws?keyword=subaru+outback+manual+transmission In PDF document text
    • https://jozokuxig.weebly.com/uploads/1/3/2/8/132814463/07bee735affbd3.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nimemoroligamaj-tafixidupara.pdfIn PDF document text
    • https://wabozejitikaz.weebly.com/uploads/1/3/4/4/134495441/vubaneji.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bagatazojiz_sidatasofugugor_sofaxazute_gureluf.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/tadovu/fundamentals_of_accounting_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/ap_us_government_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13bde38f-4b65-4f96-8f3c-cbef6d5eb037/fazebikages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6904ed33-3f5d-4e72-bfe4-f1df448445df/chinese_architecture_a_pictorial_his.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/bunga_soka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8613175-88ae-4e10-bc6f-e237d2552fbb/yugioh_bonds_beyond_time_english_sub.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/83375375089.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_off00007f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F55 5252 bytes
SHA-256: 59a19aa21df9c133b9ed3efc4e01f25f1dcf644249d628b10a184f1a3a6d81c2
font_01_sfnt_off0000911f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x911F 11156 bytes
SHA-256: b63d108013f70cde9d92c8ad07a3b7404c115e0957d3fbfd0cddf63e59793820