Malicious PDF — malware analysis report

Static analysis result for SHA-256 f43fd2e88e9e2f8e…

MALICIOUS

PDF

65.3 KB Created: 2020-12-02 10:58:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0344da4f58dbe758faf3a8c2631b987c SHA-1: 130a46f818bb348c5268bf3b4c33a09a7d8bae2f SHA-256: f43fd2e88e9e2f8e0bf77afded16f4dabd32fe4d7d625ea7275d0a0997e20065
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to phish or deliver malware. The ML classifier and ClamAV detection strongly support malicious intent. Although no scripts were extracted, the embedded URL is the primary indicator of compromise, likely leading to a phishing page or further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=definicion+de+manual+pdf
    • https://cdn-cms.f-static.net/uploads/4428331/normal_5fc2c90088ec9.pdf
    • https://cdn-cms.f-static.net/uploads/4370280/normal_5f993e7429149.pdf
    • https://static.s123-cdn-static.com/uploads/4485440/normal_5fc7029796ffc.pdf
    • https://cdn-cms.f-static.net/uploads/4470836/normal_5fbb52e35c8c0.pdf
    • https://static.s123-cdn-static.com/uploads/4446784/normal_5fc451e6e7b62.pdf
    • https://cdn-cms.f-static.net/uploads/4385216/normal_5f8eeabd9506c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc367917848ba205d2889eb/t/5fc7189d7995075abddc844a/1606883488742/gogunopejuvu.pdf
    • https://static1.squarespace.com/static/5fc0e0c67848ba205d186e02/t/5fc1eb02f81c9a2a0ce70001/1606544130800/66381006911.pdf
    • https://uploads.strikinglycdn.com/files/b93c92e3-5087-4729-9d32-a726b02d29e4/lords_supper_verses.pdf
    • https://uploads.strikinglycdn.com/files/26b29f51-e483-4ca3-a575-16c8869282e0/harriet_the_spy.pdf
    • https://static1.squarespace.com/static/5fc0c3d560f2895dc1e72903/t/5fc1eff5bc819f1cf41e3640/1606545398198/luvebinali.pdf
    • https://uploads.strikinglycdn.com/files/a3eb35ae-69f3-4445-a10c-6901f9a674c6/prospero_ao_y_felicidad_meaning_english.pdf
    • https://uploads.strikinglycdn.com/files/3566f1c8-33fb-4cbe-b3df-9d2762df7b7b/aroma_professional_plus_costco.pdf
    • https://uploads.strikinglycdn.com/files/13456dfc-0f80-4130-ad8a-3f3f341a7aa8/kafujafo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4af.bin
18ed4e3478f0040e20d8bc513d6a550a0c5729e4e9bc62a99e99ccf03972baa7
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AF 5024 bytes
font_01_sfnt_off0000d5c2.bin
4162bc5ead5df96508f282dfd0453b69a3dd5c8f20fdf4dca8d9079717f8af07
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C2 10320 bytes