Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9b6833c314e46f0…

MALICIOUS

PDF

41.5 KB Created: 2020-11-02 22:47:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 19fae0757220b9b8c891187970ea5263 SHA-1: e0cbef12ff875bbeff1addd9922fdc45fa55c585 SHA-256: f9b6833c314e46f0d7f9bb5876900cabd6bb41971087ad31ba73bdcfe6088440
114 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a malicious redirector link pointing to a URL associated with Netspend card activation, which is a common lure for phishing or scam operations. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL and the callback lure heuristic suggest a phishing attempt designed to harvest credentials or financial information.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document 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) documents that carry no urgency or charge/dispute escalation.
  • 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://ttraff.cc/123?keyword=netspend+activate+card+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366362/normal_5f8a0a2572aca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374379/normal_5f9070637dd84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379982/normal_5f9eb6bd6ab61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367938/normal_5f931964900fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403543/normal_5f962ffc0b0c3.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://s3.amazonaws.com/vukumesoj/icao_annex_6_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e60a6c5-1eb2-406c-bd16-e90e0ccab802/57363432498.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/74251711967.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/76462239605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ba5ad5-0946-43ba-8b3e-d4ca010316be/revusitadebokuru.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/arduino_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/simple_past_and_present_perfect_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2c4dd62-a813-422a-a235-187f1ab539b2/49676208032.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_off00005611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5611 4884 bytes
SHA-256: 58f5113cb10129a163875fc63633fddbbd174cf14bfcce3382a422d854116792
font_01_sfnt_off000066b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B1 10740 bytes
SHA-256: d0a228d1ee5688a267c7ccb00bb6bd178299c58933337e1397d510e634d70eb8
font_02_sfnt_off00008b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B43 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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