Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed2bee52b4c7939…

MALICIOUS

PDF

79.2 KB Created: 2021-02-27 11:44:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: aa86d1393f16f545e1696fe41881fae7 SHA-1: 285e53a49eede2c84126f06b4ffa5d4af4a70561 SHA-256: 6ed2bee52b4c79397d2e0e6077a2be59126f5944656e6bbc0e3d80e656c09245
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by a ClamAV signature and an ML classifier. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or redirection mechanism. The embedded URLs, such as 'https://seumenha.ru/award?keyword=how+many+carbs+in+a+taco+bell+beef+taco+salad', are likely used to direct users to malicious content or phishing sites. Although no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate an attempt to exploit users by redirecting them to potentially harmful web content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://seumenha.ru/award?keyword=how+many+carbs+in+a+taco+bell+beef+taco+salad PDF link annotation
    • https://nipokilalupa.weebly.com/uploads/1/3/4/4/134485501/8334632.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417049/normal_5fe05c72ee9c6.pdfIn PDF document text
    • https://woremudof.weebly.com/uploads/1/3/4/7/134701645/4562990fbeee.pdfIn PDF document text
    • https://varudigenaka.weebly.com/uploads/1/3/4/5/134597471/63b8047e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485705/normal_5fe41ec548a50.pdfIn PDF document text
    • http://tehnikator.ru/60925626268hxyav.pdfIn PDF document text
    • http://liketime.fun/ruzovojp3ccb.pdfIn PDF document text
    • http://stonersfranchise.com/23720920779rq515.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/new_moon_jan_2021_pst.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368996/normal_5fefa8293c5be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385206/normal_5ff9d5619928b.pdfIn PDF document text
    • http://remontnatali.ru/beretta_92x_compact_weightsnm5w.pdfIn PDF document text
    • https://fixojifuxupelo.weebly.com/uploads/1/3/0/8/130814076/e32bb9c8c4e07ea.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://gurabagoderes.atwebpages.com/power_book_2_ghost_season_2_cast.pdfIn PDF document text
    • http://wusanobe.rf.gd/zobimikukelire.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_off0000ea8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8B 5248 bytes
SHA-256: a5535290b308253853e08f40e93f5a9b390f90eb2ee88d797f00d8ca8a3b9569
font_01_sfnt_off0000fc4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4B 10888 bytes
SHA-256: 03306331d3ed8e394a8915afbaafca6af3881a65f419a717750693988596d847
font_02_sfnt_off00012189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12189 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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