Malicious PDF — malware analysis report

Static analysis result for SHA-256 375dc1c85e64f45b…

MALICIOUS

PDF

67.3 KB Created: 2020-12-22 19:32:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 7136366858373f0a79283de862acd423 SHA-1: 201451b7c83b31a5921ed6a551f77a8f4acd8e97 SHA-256: 375dc1c85e64f45b963bb13123276296da353ce4c59e539873d85581a3890232
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 redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'free life science books'. No scripts were extracted, but the presence of external URIs and the phishing classification strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/aws?utm_term=free+life+science+books++sites PDF link annotation
    • https://tonavamajarow.weebly.com/uploads/1/3/4/6/134694337/5772322.pdfIn PDF document text
    • https://tumokisomagen.weebly.com/uploads/1/3/4/8/134897409/4515182.pdfIn PDF document text
    • https://zemutixo.weebly.com/uploads/1/3/4/8/134865820/bidapisajakogitez.pdfIn PDF document text
    • https://kanamatadu.weebly.com/uploads/1/3/4/3/134366206/dabovovil.pdfIn PDF document text
    • https://pepowogipiwud.weebly.com/uploads/1/3/4/3/134344034/nedojalazuva-zivigemaxebefof.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/e031d21b-6bb7-4b58-9fb6-69dd5b2f3da7/safety_first_forehead_thermometer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e69f553-2d92-4ae5-8ffb-ebc3348ac079/double_cut_saw.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/baaghi_2_movie_video_song_bestwap.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/kennings_examples_in_beowulf.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/16198917360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd27a331-9735-4d6c-9876-50f22c00f359/71348312252.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_off0000cb45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB45 4824 bytes
SHA-256: 20e61502e7652429d6a2fec252aa43976e26fa6092bfa19e89a95396778dc844
font_01_sfnt_off0000dbc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC7 10860 bytes
SHA-256: 2ebdcda945077853e45ad163b7ee677a11f3d51cc51a5534980d611e03ad4414