Malicious PDF — malware analysis report

Static analysis result for SHA-256 a102e5f0c8211c35…

MALICIOUS

PDF

83.3 KB Created: 2021-01-08 08:14:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2f8ab83ead04be3a8824ab4d1a0a43cf SHA-1: 547d0ce1a9ce8ad0ca78efbecae758d9ec4fe062 SHA-256: a102e5f0c8211c35184d81a9094b252ba43bb78588f78474d1307329edc10676
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a phishing page or download further malware. The document body, though heavily obfuscated, contains keywords related to financial guidelines, suggesting a lure for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/aws?utm_term=esma+guidelines+remuneration+ucits PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369149/normal_5fa43c21b880b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470016/normal_5fdbdfc72fcf1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412379/normal_5fe546787a059.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370089/normal_5feb8fcf0ff70.pdfIn PDF document text
    • https://cdn.sqhk.co/zopinulepa/jghpyVa/like_a_boss_meme_gif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378386/normal_5ff7873381cb5.pdfIn PDF document text
    • https://cdn.sqhk.co/kufalavoxig/eXShhji/jedukovefunutus.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/929119f7-1e0c-4a7e-ad46-f2e7af0c35da/wamaderofexijovokanovuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca53c75b-5c34-4b2a-a7eb-3d4f97cba323/bukovunewodedijojipu.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/charmilles_robofil_440_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea02ca05-f3ae-4e51-9560-11c5b0d5577c/fidget_spinner_powerpoint_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e38c8ccc-19dd-46f1-ae46-b9478197a10b/pogo_type_list.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_off00010aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAD 5216 bytes
SHA-256: 343257f0d869d7ba552d47ffd0335754b47a8e27e57f80441440ecb2fbb62eb4
font_01_sfnt_off00011c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C54 10452 bytes
SHA-256: f16e53f7ea10de9ad43ba89959a1c0ed7bde50ba82f7df9b92fea7b7a73191b1