Malicious PDF — malware analysis report

Static analysis result for SHA-256 c95832b1ce1c41e7…

MALICIOUS

PDF

75.0 KB Created: 2021-03-02 19:50:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c44b7ae6ae70d762f03d650ba3122887 SHA-1: 23dcf667acc2c818535bb666943857938bb767a8 SHA-256: c95832b1ce1c41e7ce2524ea87dfcc28bbb8c23127ea0bf1cb810c5548016540
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://seumenha.ru/award?keyword=why+my+briggs+and+stratton+won%2527t+start PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405945/normal_603ceede1893a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385648/normal_60210f314955c.pdfIn PDF document text
    • http://arm-watch1.club/vegidurigaminerewzdz9r.pdfIn PDF document text
    • http://lixodamevurobar.mygamesonline.org/57668870785.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/vaponinunawivume.pdfIn PDF document text
    • https://matigolexa.weebly.com/uploads/1/3/2/6/132682665/c82febfd.pdfIn PDF document text
    • http://allrecipes.pro/affinity_designer_windows_free0e5du.pdfIn PDF document text
    • https://lugilabujenubo.weebly.com/uploads/1/3/4/3/134320616/8400fa95f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491153/normal_5ff05f2c8d9bd.pdfIn PDF document text
    • https://nofixemi.weebly.com/uploads/1/3/6/0/136082439/8157007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482189/normal_6013299d15401.pdfIn PDF document text
    • http://esmoney.site/22848801809orlcj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407780/normal_603204b833c59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388835/normal_6037ceb38c9ea.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
    • http://vavuduzika.epizy.com/57847044059.pdfIn PDF document text
    • http://gafodix.myartsonline.com/sensory_details_examples_touch.pdfIn PDF document text
    • http://josapug.epizy.com/vesepewolagiren.pdfIn 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_off0000ea35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA35 5260 bytes
SHA-256: 6e038ee14c7ea360f0c8795a6215a58c55ec1dfb1c953a1c31f62aad86c6018b
font_01_sfnt_off0000fbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF7 10416 bytes
SHA-256: 1fa71b1f702aaca567d57b508f37d15c3384444734201ec65d1bf5b4b2b09d34
font_02_sfnt_off00011f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F63 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.