Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a1f700156c7653d…

MALICIOUS

PDF

67.9 KB Created: 2020-11-17 18:34:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 0dd17097227e17dc84eb53cda0bc4f8b SHA-1: ed45a8441eb0a3faa3ac5b154c572cc58db46fde SHA-256: 4a1f700156c7653d7506f43415fddff083995d1c73625c630b225592bc864fb0
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/aws?utm_term=django+template+or+javascript In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421764/normal_5fa8f26be6a6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466664/normal_5fa513e838932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498997/normal_5fabfd708f2e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405181/normal_5f97681b6d6fb.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/c3a7b258-9a4f-4740-a40f-bddab298bfec/fetal_pig_dissection_manual_and_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d17cbc9-5348-4eb2-8af5-1a1627e1b25d/sotilupakefune.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/1971_honda_cb175_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05937578-e0ae-45d6-bc3b-71d68c41755b/wumejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41501912-68df-442a-8527-064fed8ba0f4/pemiwalubanobilabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4b50b39-dc64-43b7-9a0b-2506e6a364e3/jipolijefim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ac376c6-13d4-4882-91fe-47b64e31b914/reludomuluzuru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/507d6e8c-1739-44d1-88ab-4d7fd17be551/91501150638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aff23e49-1b2a-4daf-8d97-0a414f5ddb0a/48031180511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a9f103f-b17a-4107-a3b2-22347108f921/ribatikogezukegumugewusum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b14bda73-d00a-4c89-84b5-3872aa2b3a15/farinudadana.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_off0000c9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C8 5388 bytes
SHA-256: cd36abe7cec5a67f6d5dc23d93c4db6960c6c563ad4fc4569b55048381551ed8
font_01_sfnt_off0000dc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1F 11424 bytes
SHA-256: ca37f6f7c3a611833c49e246769a00d680fa0821772db2543dc89e34d97107b9