Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c44580e5aa62a6…

MALICIOUS

PDF

93.0 KB Created: 2021-03-19 06:25:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a439425a919b6bcfbc573fe438a4d12c SHA-1: d14bbc7273524360edfba7dbbef986e71de2e09a SHA-256: 62c44580e5aa62a6a2e3a6c22d6233c9d395f4083674ee89254c243929ce0728
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://ponafet.ru/strik', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to a book review summary, suggesting a social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=east+of+eden+book+review+summary
    • http://sifulodidikit.22web.org/lubuginiwug.pdf
    • https://cdn-cms.f-static.net/uploads/4495037/normal_5fe98329ca589.pdf
    • https://cdn.sqhk.co/sisamide/0jcQOjf/nawuborikufalenuzanotubak.pdf
    • https://venumokup.weebly.com/uploads/1/3/4/8/134866871/famafep.pdf
    • https://cdn-cms.f-static.net/uploads/4500665/normal_60219c2fd0b1b.pdf
    • https://dunawotota.weebly.com/uploads/1/3/1/4/131438316/delokikizisolil-rapatodasikameb-dabanosudafimi-kijiginu.pdf
    • http://botanilix.mygamesonline.org/rolokagojab.pdf
    • https://cdn.sqhk.co/manowipete/jcgeTia/absorption_spectra_of_photosynthetic_pigments.pdf
    • https://cdn.sqhk.co/lopedovev/ibGxefx/21469330467.pdf
    • https://cdn-cms.f-static.net/uploads/4370533/normal_6024571b561b6.pdf
    • https://cdn-cms.f-static.net/uploads/4380859/normal_601adf1085702.pdf
    • http://tufurujepuduxop.22web.org/diccionario_biblico_hebreo_traducido_al_espaol.pdf
    • https://cdn-cms.f-static.net/uploads/4420604/normal_600c6ddba7475.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sutusagavol.epizy.com/dometic_rm2193_parts_manual.pdf
    • http://tagijonegularol.myartsonline.com/zutulepumeju.pdf
    • https://uploads.strikinglycdn.com/files/a7c3dfff-7c07-43bc-a66e-28f6e22a9a3c/rivegakixupeg.pdf
    • https://uploads.strikinglycdn.com/files/d9cdaf7c-ba83-47e1-bf7e-ceab7f9cc154/cuanto_es_150_gramos_de_azucar_en_ml.pdf
    • https://uploads.strikinglycdn.com/files/2e341889-2b80-4755-9828-6caeb450f79a/zen_3_review_date.pdf
    • https://uploads.strikinglycdn.com/files/d80ec3df-c902-4ca6-b010-1faf1efc491e/ariens_engine_replacement.pdf
    • https://uploads.strikinglycdn.com/files/ee9a764a-f0ea-4391-8cfc-3a5a226b964a/40244534860.pdf
    • http://bitenozof.atwebpages.com/mmrc_dyspnea_scale.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d6b.bin
955e6b99e1cf0cfbb772d29d3ee76215241f1a4443e589479adbb578e3b4b2b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D6B 5436 bytes
font_01_sfnt_off00013fee.bin
33bfbb0c3ec80b15e1d9393f5c3b02daf48747555c551b16e73f661bb0275ccf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FEE 11596 bytes

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