Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd490af02b27e0e4…

MALICIOUS

PDF

73.7 KB Created: 2020-12-17 03:48:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2de6006a7b9ced1e0a8a2eb230329163 SHA-1: 914b2ddb8dd95fe871f68ee6363c40f35a413415 SHA-256: fd490af02b27e0e4f673f9add1afae44f4be3ee049e71159ae9335c44e1c10c0
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high-severity heuristic firing for an image lure linking to an SEO redirector, indicative of a phishing attempt. The embedded URL, https://trafficel.ru/123?utm_term=carver+middle+school+cheerleaders, is the primary indicator of this malicious activity. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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=carver+middle+school+cheerleaders PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4505159/normal_5fc73197d9222.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378830/normal_5fc44380392d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f8acc8555bce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392661/normal_5fa3685de2c8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_5f8bf31337e2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391642/normal_5fc115667ae93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403676/normal_5f9369d795e22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379474/normal_5fbe88a2b3931.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/136e616d-fd92-433c-a3cd-39de7c6daf42/bibejobozirixev.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6d1fc9849b27a00a25d04/t/5fcf14c814319a51dc29cd93/1607406793165/56822361115.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

Related samples 2

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
font_00_sfnt_off0000d69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69E 4864 bytes
SHA-256: b830682b495425c9e0fbda5d3dad1e60d3123a500e9a0fa60a8d0de1f56f55af
font_01_sfnt_off0000e724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE724 10744 bytes
SHA-256: 76fe377ae7b6de4a50279d7fc8663dae4f76ae043dc8e4ed8b8acb29913bfde7
font_02_sfnt_off00010bb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB2 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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