Malicious PDF — malware analysis report

Static analysis result for SHA-256 f37bc3d0bd7d21ef…

MALICIOUS

PDF

146.4 KB Created: 2020-12-30 02:06:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: a31d28a14fe571b7d1f68a8a118cbe0d SHA-1: f0aef526a263415a048120e2c7af78b5abd5bf1b SHA-256: f37bc3d0bd7d21ef5adf62c1669dc7f82fec8807ab9363cba1f68583d60fd804
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded links that redirect to a known malicious URL, identified by multiple heuristics as a redirector for phishing. The ML classifier also flagged the PDF with high confidence. Although no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to lure users to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9352

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/strik?utm_term=dunkin+donuts+menu+prices+the+charli In PDF document text
    • https://cdn-cms.f-static.net/uploads/4452626/normal_5fb5f7d08fabb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_5f88aab572da0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385636/normal_5f94de276e2b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495387/normal_5fad35143c4b1.pdfIn PDF document text
    • https://cdn.sqhk.co/xejarirep/jilij83/feluxipevevi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425229/normal_5fa7b556e4be8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390071/normal_5f9237bc3073f.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/23bbc598-3f43-46b5-812f-f9443f2e4fcf/ledipemutafu.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/movimiento_rectilineo_uniforme_concepto.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/pukimumatepifamemizef.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/64750092769.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000160bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160BC 19876 bytes
SHA-256: 3a787fdfbe1f442f8cced6ef7eae1872e6f78dd2ec8680992b7a8e50b3ee2c17
font_01_sfnt_off00019f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F5A 5256 bytes
SHA-256: 37c31a9693fd7a637da2c7d16c6247a5c3dea3108cd4c5712834c47eacca0155
font_02_sfnt_off0001b100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B100 16264 bytes
SHA-256: e2931472b336ed193fdab7768db0810eaf2793d498fa2b35052df6b686ab8c83
font_03_sfnt_off0001e1f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E1F7 12560 bytes
SHA-256: 2caba272fecd0b5b62addb9037fd9bb3e003165bef436f46c768b71d13677315
font_04_sfnt_off00020c24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20C24 17548 bytes
SHA-256: f688a40bbfbb8b587952e940373d2f37a94e6df992b27d81204d672211e89600
font_05_sfnt_off00022554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22554 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
font_06_sfnt_off00023308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23308 1736 bytes
SHA-256: 74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d

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