MALICIOUS
262
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 User Execution: Malicious File
T1059.007 JavaScript
The PDF file contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a ML classifier flagging it as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Google chrome free for another computer'. The presence of a download button and browser installation lure strongly suggests a social engineering attack aimed at tricking the user into executing a malicious payload, likely a second-stage download. The ClamAV detection further confirms its malicious nature.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
Heuristics 8
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINKPDF 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.
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Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINKPDF 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.
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Browser extension / update installation lure high SE_BROWSER_INSTALL_LUREDocument tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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Callback phishing phone lure medium SE_CALLBACK_LUREDocument asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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://traffmen.ru/aws?utm_term=google+chrome+free++for+another+computer In PDF document text
- https://cdn-cms.f-static.net/uploads/4459936/normal_5fb7961f70904.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368225/normal_5f8c25a294188.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383137/normal_5f8bb1160ebe4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366405/normal_5fa9e7feb7f2f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381539/normal_5f9940b2d74c1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371240/normal_5f9b6f10ba0a5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377678/normal_5f9c90fa750a2.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/liguwubore/rory_gilmore_reading_list_spreadsheet.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/deec7ab9-4245-4676-9ebb-bc552ea8f5ba/18835521986.pdfIn PDF document text
- https://s3.amazonaws.com/jusuberu/vuzokixixulemilesaxonode.pdfIn PDF document text
- https://s3.amazonaws.com/gezetega/56110361366.pdfIn PDF document text
- https://s3.amazonaws.com/rexogeguxosix/catalogo_mary_kay_octubre_2019.pdfIn PDF document text
- https://s3.amazonaws.com/fapaga/zabusivebuxuresetaz.pdfIn PDF document text
- https://s3.amazonaws.com/lonozote/savapimokojezokixowobe.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.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000cb0a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCB0A | 5280 bytes |
SHA-256: 14cc6adba846e6b997dba39c77656986fc691a7594773fbecc90477860cacf96 |
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font_01_sfnt_off0000dce2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDCE2 | 10300 bytes |
SHA-256: d87a1fefa7edc9feb6536f8679b69d6d434888645d364c591d1775f038ee2a8a |
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