Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d82e25d81aa6586…

MALICIOUS

PDF

76.7 KB Created: 2020-12-07 19:03:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d66c9c006851a6b419e4f945c0610207 SHA-1: 1c6c6f32306ac1bb39dd3357ef3ccd58d23994b2 SHA-256: 1d82e25d81aa65866640b2c8e8aca6f24aaafcaa92972a2b952590b0655dccc6
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, one of which, 'https://traffmen.ru/123?utm_term=the+miracle+worker+study+guide', is identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of malicious links suggests an attempt to redirect the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=the+miracle+worker+study+guide In PDF document text
    • https://zafigitelerom.weebly.com/uploads/1/3/4/3/134338481/62977f57803f8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463298/normal_5fbaa61d5c62f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393044/normal_5fc0cb8c5fdf4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449987/normal_5fc557dcc21e8.pdfIn PDF document text
    • https://zofevubofuti.weebly.com/uploads/1/3/4/7/134768025/gulezu_rejodere.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479673/normal_5fcb6aa2ba9dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448733/normal_5fba17d89170b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459636/normal_5fc70db1d1dd0.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/bedb1b67-6c4a-42ad-abf3-1407994e5da0/88198223613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97f32d8b-dc4b-4a18-bfc9-3edba61e750c/2003_volkswagen_jetta_1.8t_owners_ma.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/89208545677.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_off0000dec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC4 5336 bytes
SHA-256: b093ab6d812b1ecbe7816d03846ea2d70782139395bf2d73b4210aec7d0cb0d8
font_01_sfnt_off0000f0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F9 11584 bytes
SHA-256: 827a13bb2a38184790264b62b6ee37cfcaba91901cb3c05bc4cc2e6ad15e9009
font_02_sfnt_off0001181a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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