Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a9c935aaed5cf17…

MALICIOUS

PDF

76.1 KB Created: 2020-11-09 18:08:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ad752c0772908ea6e5c3720f4cab2298 SHA-1: 89f836f503ef445587e5203bf53e5251567d4bae SHA-256: 0a9c935aaed5cf17970ec1925387ce65155f5b4d76811efad3ecda07a2523f0d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 high likelihood of malicious intent. It contains an embedded URI pointing to 'traffking.ru', which is likely used to redirect users to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a 'Fujitsu wired remote controller manual'. No scripts were extracted, but the presence of external URLs and the overall detection profile strongly suggest a phishing or downloader attack pattern.

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://traffking.ru/aws?keyword=fujitsu+wired+remote+controller+manual PDF link annotation
    • https://didipovewefof.weebly.com/uploads/1/3/4/3/134306756/c21ca7bab4b61.pdfIn PDF document text
    • https://pegepigav.weebly.com/uploads/1/3/4/4/134481067/fakefoxukeves.pdfIn PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/pobozo.pdfIn PDF document text
    • https://pefuxagofir.weebly.com/uploads/1/3/4/3/134359429/vikuwomow-mewojonokofewi-mujiduwo-januk.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/eb0d53c7-a3a4-4b21-864f-b3fbda9d0393/vipawumijudugufa.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/equivalent_weight_calculation_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbd22a07-f6b2-4a2c-9ffa-c7311727fd40/77707762531.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/demand_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/gelobokuxirifepelexip.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/kufejalokilukebopobinajid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f81bcc5-db84-40cc-8d8e-174d6d77c210/60203263282.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/bernard_campbell_middle_school_volleyball.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aa5cc17-a80f-44c3-a49c-cac91fe1d35e/escudo_de_honduras_imagenes.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_off0000ed0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0F 5208 bytes
SHA-256: c3d6dfd20cda7288f54837b4d2bbd7ceeb46718907b8de9750e3b42dcbd899ac
font_01_sfnt_off0000fec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC4 10728 bytes
SHA-256: fc106207917791bfe77c18c575d3862afa40c88e1bc3d87bc26bdbda87e0453d

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