Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca8501f05561bfb…

MALICIOUS

PDF

67.4 KB Created: 2020-10-31 14:02:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 35cd65d4e19f29d4258304cd9a70e52e SHA-1: e90fff82d451ea2cb3880728fb896d67ea8e7b99 SHA-256: 0ca8501f05561bfb40a91f24ceecfd4dad7fc3c4606e87f90721d62564a0241b
154 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://ttraff.cc/123?keyword=hcg+drops+available+at+gnc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414339/normal_5f987d9b7c894.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/2329c6fa-90ea-45d1-a192-0b934d3ac77a/28074101462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d93ae3b-33d4-4c13-a365-ecc5738aa847/sozenewiginiguxesomafini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b399974-5958-4d1d-aef0-9ffbb56e797b/lofepirogolusozetiji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac2f07b0-c7b7-40da-bc26-9e9efab9e629/72560844562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70058626-e71a-4a7c-af0c-7330634b956d/baixar_livro_depois_de_voc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdbce753-842a-43e8-9f21-6687361a2add/92039606151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85bb41c-86dc-45cf-9562-950b89efe549/bully_geography_3_all_answers_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9fab521-7831-4b59-a74a-322d04b751a3/controle_svt_3eme_chromosome.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/vibajipefemovedotif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c107c744-3dae-4a65-9ec6-10dbc0cb69eb/45156662433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fb88b43-5814-4af6-92d8-27bf4b677572/78244028017.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_off0000c653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC653 5404 bytes
SHA-256: 76752eda8651e3ab246720610af00763de2b08cd01959b1963c83701cbad59a7
font_01_sfnt_off0000d8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C1 11832 bytes
SHA-256: 686e1bfff69911666d4d543615e52f591fea603cd6ebe3adccdedae6204fc634

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