Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e095b9a76b1cc3…

MALICIOUS

PDF

45.4 KB Created: 2020-11-05 23:45:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 80680ba4c335475966c26fe2f017e6be SHA-1: 92f5286382476d4f14fee6df0b2feec0247c6e5f SHA-256: f9e095b9a76b1cc3c2aa1ffd00971044fd1838a66a9ef91872551e8eefe398eb
76 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as suspicious by an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/123?keyword=list+the+pilgrims+in+the+canterbury+tales PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383567/normal_5f9497ac7e3e9.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/tugekewekuzefelux.pdfIn PDF document text
    • https://zonuloxovuge.weebly.com/uploads/1/3/4/4/134469127/9516097.pdfIn PDF document text
    • https://puwukozo.weebly.com/uploads/1/3/4/5/134587621/puwokabekefavovibixi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366622/normal_5f9663ec3b1af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419628/normal_5f9cc71ede1df.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/tapategajevawopaji.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/0ca55851-a460-40ee-828f-355d494ba524/nadapofowi.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/18563025933.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/pitonolasabijaranodi.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/active_learning_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/628bd280-2a6c-41f5-b972-6ce7df449700/kotirikelu.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_off0000741d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x741D 5528 bytes
SHA-256: e340f8a8cbc9d6ce296f36b92aedec4d9f9bd22b96b58385d5349dfe7acc6a36
font_01_sfnt_off000086cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86CB 10124 bytes
SHA-256: cba48c0db778291ccb999287e21dcaa3f376af1b32c3871f653ca6e8f19cb58c