Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c27fbe7a98ae7af…

MALICIOUS

PDF

95.3 KB Created: 2020-12-17 22:16:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 23555035217c678a80e688b0ee822800 SHA-1: 7dea898e216fbec2b3eb30d6a6af08b8f4fc16c3 SHA-256: 2c27fbe7a98ae7af853191a8dfaa894d5ce7f22dd7f020d26abaa6f54481e5ab
214 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this PDF as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text related to a 'free printable calendar', suggesting a lure to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • 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.
  • 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://cctraff.ru/aws?utm_term=calendrier+2019+%25C3%25A0+imprimer+gratuit+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393515/normal_5f8ef6aa291aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369793/normal_5f8918d97a551.pdfIn PDF document text
    • https://biwezufum.weebly.com/uploads/1/3/4/8/134872286/8074961.pdfIn PDF document text
    • https://togimapobeno.weebly.com/uploads/1/3/4/6/134649298/fuvisavepe.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/098a0895-51f9-41b0-8853-da337104a54f/acls_stroke_protocol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5880cb3e0f577146980e/1606375553974/best_star_projectors_for_adults.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8d2c9f-1226-4067-8b20-260fa767c123/fugegixigokagode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5c90ca0-88e8-4440-bf40-3a89d50b8bf2/mozalozeketegel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3cd37a6-8f90-4252-9c77-0c3e72391cf9/john_deere_model_a_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48688992-2af6-489f-a3e8-aae602b8887d/tevidolezuxowalezarabuxik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3e7f01a-77c3-444f-a7c8-29ac26994c31/ginavepipejarebiwiwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31b7a324-ab88-446a-9c44-53b558843248/2008050706.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000134b4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x134B4 24652 bytes
SHA-256: 695a75ba38794b673aa0c885ff1e6ee1c5dd5e6f31e92e02b56dc1f5ed62090e
font_00_sfnt_off0000f983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF983 5692 bytes
SHA-256: 59fde8999d156d2947fc6a7e080c5948c7217c84950a5caccdef7fd7aa7e2173
font_01_sfnt_off00010c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C40 12884 bytes
SHA-256: 951b94799ef7cde12c9f654c55420aef7185e566dec5698ca94fb5ee55c4737d
font_03_sfnt_off00015f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F7B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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