Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c3b9032b91dc049…

MALICIOUS

PDF

77.1 KB Created: 2020-11-14 00:06:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 030ee9620d449a17f5f2bca9aaa33d5c SHA-1: 6e46ba0e4fa563ef1d4134447d98dc791d744433 SHA-256: 5c3b9032b91dc0499289196403a09633bd381eba09ac374e366326de0b5fe93f
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It contains a link disguised as educational material ('Rotational symmetry worksheets grade 4') that redirects to a malicious URL, likely to deliver a secondary payload. The presence of embedded URLs and the ML classification strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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://gettraff.ru/aws?utm_term=rotational+symmetry+worksheets+grade+4 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f875a50b8ff4.pdfIn PDF document text
    • https://jatasurow.weebly.com/uploads/1/3/4/3/134358583/kazugosisabeg.pdfIn PDF document text
    • https://lonerunit.weebly.com/uploads/1/3/4/0/134017922/17a34bc078759.pdfIn PDF document text
    • https://wubugivaruj.weebly.com/uploads/1/3/4/6/134669137/5382341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474727/normal_5fa6dde08a9fc.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/d04c495f-c20e-498e-a212-27a0a5df3e5e/wudisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd4d9095-a1b1-4151-858b-24fa77f7b619/74545596942.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/minecraft_shaders_pack_1.8.9_that_boost_fps.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f8c9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF8C9 27500 bytes
SHA-256: 79c175383234000f057af406f5c6687c8fc3c51a629e7aca9fa6fbe991f45fe5
font_00_sfnt_off0000c33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC33F 5592 bytes
SHA-256: fde954ef06ca96a78553fb57b9d9b03e351e326362e1973f4bfcd286ccfaa5e1
font_01_sfnt_off0000d641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD641 10044 bytes
SHA-256: ed6a1ca02b17057dc9e479ea0ecbb9e8879c1cdedd60f6c0581280b26cda16ae

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