Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44a55eb8dfd23fc…

MALICIOUS

PDF

47.6 KB Created: 2020-11-06 13:31:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7d3e02d7751816cea00ef7c6f801fdf8 SHA-1: 3f59117dbd50233c30a780cbff21e165d4a45fad SHA-256: e44a55eb8dfd23fccfb86e0b744e20c8510b32653fba952f5db61ce0b36f61a5
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://traffine.ru/aws?keyword=spotify+premium+apk+pure In PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/46c714f78d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414494/normal_5f949014b6de3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f87d68d5578c.pdfIn PDF document text
    • https://majubatu.weebly.com/uploads/1/3/4/2/134265851/ad707592573d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372100/normal_5f8d6db48102d.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/019d9ef3-3eb7-4bd0-bd33-a0e9e2945987/rawaravutala.pdfIn PDF document text
    • https://s3.amazonaws.com/vibove/74476045534.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/volos_guide_to_monsters_firbolg_stats.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/7972947488.pdfIn PDF document text
    • https://s3.amazonaws.com/kafifawono/21340821206.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/19152571678.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/oster_ice_cream_maker_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30646928-123d-47b6-8472-8f58fc30ae83/41826703640.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_off00007ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC4 5104 bytes
SHA-256: 251752988679f9f97f124eef135de936c96e9f2874e5f0bfa3b3f00c3be1fe97
font_01_sfnt_off00008c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C1C 11012 bytes
SHA-256: 28398e8154159bf27d5a486df5712d5dff992fcba1a3ea6d75527cf4f5f060a6