Malicious PDF — malware analysis report

Static analysis result for SHA-256 a65025a9d9914092…

MALICIOUS

PDF

37.1 KB Created: 2020-10-10 09:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 04708247bf659f93f8421889e9a69071 SHA-1: e8cf5ab20bc0f2820eab9faa827d7d322a65fca4 SHA-256: a65025a9d99140924605573e840df8648f40645fa3d7494822a61f03b28adebe
162 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://ggtraff.ru/strik?keyword=laborers+local+231 In PDF document text
    • https://site-1039342.mozfiles.com/files/1039342/7131993314.pdfIn PDF document text
    • https://site-1036761.mozfiles.com/files/1036761/26565895885.pdfIn PDF document text
    • https://site-1041861.mozfiles.com/files/1041861/62278976720.pdfIn PDF document text
    • https://site-1037103.mozfiles.com/files/1037103/72668704894.pdfIn PDF document text
    • http://nukixiv.ombodieslondon.com/uploads/1/3/0/8/130814328/8449486.pdfIn PDF document text
    • http://files.thegfsc.com/uploads/1/3/1/4/131453610/besimibupiniwa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/84028c3d-ceba-4707-bf4e-ec8837625a5d/nazidelunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/042a7970-7868-46fc-b147-aa7e92a24207/94456937025.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27694c2a-bd9c-4d32-9984-8c5e9ebf1dcc/gudasepifizejamuditodefuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95fc43dd-c142-4200-9795-196037d0e72b/2496306068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23783898-403b-4b2b-b931-77a7d708bef3/74956651946.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88aec383-e833-44bd-a9b0-1b48e91c9f31/labozotamenegu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000463f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x463F 4776 bytes
SHA-256: 9760948a90639e2fe7dbec4c9f69730d11f8a21e529275b14e22e2d0c68929ba
font_01_sfnt_off0000567f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x567F 10528 bytes
SHA-256: cce59f04c46f4d437ef3bf3a94cb449f9e4bccea9db47b243a80262443c5811d
font_02_sfnt_off00007a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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