Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aacdcd34de0a458…

MALICIOUS

PDF

68.3 KB Created: 2020-12-14 07:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7f6e857af53aad71574a196d181a59a7 SHA-1: bfdd5f88749414e8a61e8b60139eeda809068aaf SHA-256: 5aacdcd34de0a4586c9e4fd3a0146423038e29957567b4b5a63ff001268fa2c6
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 flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'traffine.ru', which is likely a phishing or C2 domain. The document body, though heavily obfuscated, suggests a lure related to 'cnc engraving machine for stainless steel'. No scripts were extracted, but the presence of an external URI and the ML/ClamAV detections strongly suggest a phishing attempt.

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://traffine.ru/strik?utm_term=cnc+engraving+machine+for+stainless+steel PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383446/normal_5f978c6469c12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388165/normal_5fc11c311cad9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380883/normal_5f8b3cfb0ffdf.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/5fc10fb5bda9c57a97bf17be/t/5fc1be9461e25426e1792dcc/1606532756772/the_beck_diet_solution_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/algorithm_design_solutions_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc101f96609fd0ee791e489/t/5fc1e0d04f983757202439bd/1606541521101/lost_knife_hideout.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d024a87939686421378a/t/5fd176400f163860c7a5129a/1607562816719/mac_word_2019_spelling_and_grammar_greyed_out.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf49675147b1480429382c/1606371688023/edjing_5_pro_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d12c3dfdd95b60d4a66f/t/5fc37399bc819f1cf444eb1d/1606644633577/lakid.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/how_to_cite_images_in_apa_format.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/vukojesuvojajexiv.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65358085bf90c0e222242/t/5fc84f5e217b3604edd82161/1606963040186/wood_cutting_tools_for_beginners.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_off0000cdc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC9 5260 bytes
SHA-256: 62df42d49b37a58d00f78d7de11a20c0b126eb3a721d7103a2d02c23c9494c7d
font_01_sfnt_off0000df8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8E 10988 bytes
SHA-256: fb83416ddca916b91b3099ca690aa7844abdb2d537a65dc59bddc8dd5437ae58

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