Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f063dbd854f543…

MALICIOUS

PDF

74.2 KB Created: 2020-11-17 21:36:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6eef5c440c58f4478ad64fa8b92fe99f SHA-1: 128d16ebf190154b2a9d907ccad3fa10653ea114 SHA-256: f1f063dbd854f543db7c967217d94f47d98ffc66cb2270c30b6af50b5c81957f
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 'trafffe.ru', which is likely a malicious domain used for phishing or distributing further payloads. The document body, though heavily obfuscated, suggests a lure related to 'visual ethnography'.

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://trafffe.ru/strik?utm_term=doing+visual+ethnography+pdf PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/56bb8771-d67f-44c6-96ea-c9fe1d8bd326/55261476685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b21c013-e4d0-492d-acc3-79d0ebd97ca2/6124813412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6619185d-0d8e-47de-a109-225d6cf7729b/xopulase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dc306b9-7e61-4c56-a386-7586965fe4aa/economic_liberalism_ap_euro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cbdfe9f-cfa5-4aa1-9085-2a40a53e2210/subidimiwasirogerasuno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c580a5-374e-4c56-b3ba-56e6cb40235f/free_cash_drawer_count_sheet_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62559837-f196-4cdb-a215-debe44f3fc8d/pokemon_tcg_redeem_codes_free_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4d2d342-ed2e-4094-ab0c-f35fde56d982/lotatelepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/452f462e-a9a1-4964-8157-c937a0150c87/gutugojomutilewubalirevum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b739530f-fbc3-49b5-98ca-ee229269f6d0/832329960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4c50fd8-b362-4029-bc6b-fc3069bc2733/wiveko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8273a39-a2ae-4f4a-8dd9-df0d85052c14/mejadazulemonaxamudoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaf63ba1-b663-4500-a46d-78ab7da2647e/pufewunexenoxofiwepimoso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e40a52e4-2ab8-4016-a154-15d1fab5883a/rebexawox.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_off0000e413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE413 5464 bytes
SHA-256: ba4dab2d2075b244d8832226fa6c7e621b6ac28a3c06a068fe901bb97745f7d6
font_01_sfnt_off0000f6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BA 11128 bytes
SHA-256: 97ef855b20769731620034e64e9f652fb156ccc1a005c4cf0ffb38418e59e3c0

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