Malicious PDF — malware analysis report

Static analysis result for SHA-256 af33a19999d375b6…

MALICIOUS

PDF

68.2 KB Created: 2021-01-07 22:50:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 06622ab8db91daa8350857df3309cc72 SHA-1: dec5caccbcd7c430a3d89525562d49ec57c97646 SHA-256: af33a19999d375b6972fa89100e60fe6488dd5fa6de2148b1ccb5ee8bde40056
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a high-severity rule indicating an SEO redirector for phishing. The embedded URL, 'https://trafficel.ru/123?utm_term=avatar+the+promise+part+1+pdf+download', is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains text related to 'avatar the promise part 1 pdf download', suggesting a lure for a specific file. No scripts were extracted, but the overall pattern points to a phishing attempt using a redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://trafficel.ru/123?utm_term=avatar+the+promise+part+1+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469860/normal_5fc95af79dd28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377902/normal_5f8af0d4bc3e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466659/normal_5fcaf80c2ed5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457620/normal_5feaeb6d784a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380382/normal_5fa4876adecc9.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/06d40e3d-bc7f-4204-bb11-f4d54848bd9a/manual_illustrator_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/85115400604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d33dcb4-72c7-4a93-a4e4-2d89df317c87/sky_tv_guide_mexico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61185b87-9d66-4886-b8e2-d24a5560a15b/80507458119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9897f7e-8ac5-4199-8025-4da9ecde6dff/what_is_pocket_wifi_hong_kong.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e862684-df35-45c3-96bb-6d272b5f25e5/20628746384.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_off0000bd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD24 5264 bytes
SHA-256: d7cf086dc8fefcefc81b051178c4aa1c4802316aad6da03abb65cb1b5ffe91d1
font_01_sfnt_off0000cef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF7 10936 bytes
SHA-256: b130aa1d59942ec157e3ede1aa70539138e76f2fcd5579fa8be00a72aea92046
font_02_sfnt_off0000f40f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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