Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e771dd540011c59…

MALICIOUS

PDF

68.8 KB Created: 2020-11-26 01:58:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b676c11cc6254ffc39a3af0106396b80 SHA-1: 1bbb73ac225701314190d833c3aa69a8cd37cd72 SHA-256: 6e771dd540011c59f65fdd0a65098513aa137a0a787aeca2adbca2f7c3be7b94
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to self-talk worksheets, likely to trick users into clicking malicious links.

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
  • 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://traffine.ru/strik?utm_term=positive+negative+self+talk+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4424647/normal_5fa2fa8c29345.pdfIn PDF document text
    • https://sosegesidor.weebly.com/uploads/1/3/4/4/134465043/lisarudep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421464/normal_5fab34f1714ac.pdfIn PDF document text
    • https://zazokovorif.weebly.com/uploads/1/3/4/3/134321981/6795043.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4937411f-d36e-4c41-92e3-ae3677e315f4/sokisilepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f2545e9-6e2f-49e0-a4af-93d30ecde8e7/ralevegoxomujaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/951eafcc-e28e-43e8-9929-8c5d4b117235/37277829621.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/upsc_sociology_syllabus_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5a3a2e2-61fd-46c8-b1b2-7f88ee83ebe1/47029458893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c8abee4-f4db-4cd8-a7e9-c5607df58dd4/pejaxege.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/vizitake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ef4a27-a288-41a9-bb96-c6080cb5fbec/marobidepopobibupuredobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0ab40ed-d8e4-41cc-8e09-971e2074c065/95544200276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00b9762f-541d-4bef-88a9-e334890f3e91/tiwifuraze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4160ecaf-de5f-48cf-bb61-a1c977c6938c/rivifadad.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46E 5248 bytes
SHA-256: 5e9bffa6006a6a32207adcb119350c86900346d2f1168f173455bc49ad3ac5d1
font_01_sfnt_off0000e65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65B 9376 bytes
SHA-256: 49ffbf5fdb9f3d5e847125a08433aca565589e9aeca16f1f21b27acc6ebaec46

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