Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c86e8f5fc1ff0f…

MALICIOUS

PDF

67.8 KB Created: 2020-12-19 01:20:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 4866177b162f3b6bd2ac5d74081b19a8 SHA-1: 71af01592bdfc38a87048f2a9a9ca6fb19339e43 SHA-256: e9c86e8f5fc1ff0f426339303a6e1baf89d259c9cbe1b79d68f17c654a0ee8bd
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URL that directs users to a suspicious domain, likely to host further malicious content or phishing pages. The document body, though heavily obfuscated, suggests a lure related to training certificates.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/aws?utm_term=training+certificate+format+in+word+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368504/normal_5f891d56d28c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423155/normal_5f9ce94dec4dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc7942e9ea50d4120a26292/t/5fcf5e6dcd9a2056ff753af0/1607425645764/14453306426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fe738e9-30df-4313-8075-732c304026d8/yarold_christian_leyte_quintanar.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/zakaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f4f313-1613-411e-a823-0147e052b966/one_hundred_scouts_poem.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6c5e8c39fde0238a55e3e/t/5fcec211caa95a391e591fbe/1607385618436/taxegi.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/ahista_ahista_movie_video_song_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7a04f02915d4a16f99096/t/5fd0240126d54b3c06c7d80c/1607476228409/black_friday_2020_deals_walmart_tvs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31587348-c74f-4478-a7d5-af53898f992e/jalapeno_bagels_comprehension_test.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_off0000d066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD066 5172 bytes
SHA-256: fc0c450d5960435e67b87c9e44228607308483199fc469ec45174f07c4f28ce4
font_01_sfnt_off0000e1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FC 9452 bytes
SHA-256: 2748718cadb96b65c59caa1c38ba595b18370ba52d03e102b403e7a187e9d0b1