Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cdd8fe759830a0a…

MALICIOUS

PDF

68.0 KB Created: 2020-12-14 01:36:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f7e547976fcaae7ead90a1fca8075773 SHA-1: dbe15ff2e014449e05d1315fc38acaca6087a55d SHA-256: 7cdd8fe759830a0a08678b1a3d4717d05ad25a670a10e91cbb0cce36ddda75e0
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/aws?utm_term=information+architecture+jobs+toronto'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a harmful site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffmen.ru/aws?utm_term=information+architecture+jobs+toronto In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f939fee97dd1.pdfIn PDF document text
    • https://wusunipusu.weebly.com/uploads/1/3/4/3/134320006/jovaviziguzetofewi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389376/normal_5f91fffaf30a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471704/normal_5fad44b353d79.pdfIn PDF document text
    • https://bipikutifegex.weebly.com/uploads/1/3/4/8/134868884/7354249.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383295/normal_5f9f3099ec00d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384851/normal_5fa916877b0b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_5fb9c2fecc8f1.pdfIn PDF document text
    • https://duzareledibasa.weebly.com/uploads/1/3/4/8/134890493/3878806.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/mozedijiz/9270060731.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/76285920877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b089244-cf16-4420-934a-848a36598aee/562698775.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/mimilepapunawubemap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b39b324-06a9-4321-9fc1-2ecb738d2d19/barbie_presents_thumbelina_full_movie_online.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.

FilenameKindSourceSize
font_00_sfnt_off0000ca5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5F 5240 bytes
SHA-256: 9c6878471199d2045c61dce81aec6b1e8c8bbe234dafa88842f0c93dc148ba7b
font_01_sfnt_off0000dc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0B 11756 bytes
SHA-256: eb2a2af143b6f7240a1659ae5f58dacbd2ec4a64d59359d25202d352ac3c9e84

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