Malicious PDF — malware analysis report

Static analysis result for SHA-256 38cae0cffe090fff…

MALICIOUS

PDF

62.9 KB Created: 2021-02-18 22:44:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1832bab81e384d511b9383b0fd0b4e2b SHA-1: 8a28b637df2e7e3c6f19a9bbf0a7a5e002bf443b SHA-256: 38cae0cffe090fff95839436602bd0f71a70c0e708101e5eddd643a020370ab7
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to search terms, further supporting a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=carlos+carvalho+santa+clara PDF link annotation
    • https://sulipebi.weebly.com/uploads/1/3/0/7/130739254/suvimiverutege_lurat_liturumo_zofur.pdfIn PDF document text
    • https://goxejebifebiv.weebly.com/uploads/1/3/2/6/132682819/patojop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374185/normal_5fc9179250ced.pdfIn PDF document text
    • https://navikeput.weebly.com/uploads/1/3/4/7/134755574/d3724b.pdfIn PDF document text
    • https://bexubumid.weebly.com/uploads/1/3/4/0/134040754/3946031.pdfIn PDF document text
    • https://sovejugi.weebly.com/uploads/1/3/4/6/134652237/332a9c19cbd79.pdfIn PDF document text
    • https://tudexabi.weebly.com/uploads/1/3/4/7/134770635/3784694.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/vikiletafago.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/mannington_vinyl_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/foxit_reader_free_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/polupubezevibafebivivof.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/residence_certificate_sample_letter_format.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/poxutukamemoduviwobaxiza.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/abbiamo_bisogno_di_informazioni_in_inglese.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_off0000bb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB0A 4852 bytes
SHA-256: 0bd5fae0b2e0a0f2dcf794f8f056744626d7606c434fbe0b5270912f171ef49b
font_01_sfnt_off0000cb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB83 10360 bytes
SHA-256: dec6b0003f9519db755fab00b8bf1e1ad663ac1665a2c28179ab89455ef9a30d

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