Malicious PDF — malware analysis report

Static analysis result for SHA-256 397d597999abc2c1…

MALICIOUS

PDF

75.7 KB Created: 2021-02-28 13:00:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 32b8f9c49b6b8e3f0abf2765daf2ae2d SHA-1: 75f28697b881cd76e9b7f7912296bd00642b4c98 SHA-256: 397d597999abc2c10b9020a35b0a01afcd57a47cc8d9fef470270e9a5d9ad9e5
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'nipisod.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to reviews or tutorials, aligning with common social engineering tactics.

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://nipisod.ru/award?keyword=presto+dehydro+review PDF link annotation
    • http://dehydratedoriginalgoodness.com/rejepakutabijorofi4wk6u.pdfIn PDF document text
    • http://pornbustyvids.com/freecad_tutorialnukib.pdfIn PDF document text
    • http://openchambre.xyz/122971059689s6kd.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/excellence_riviera_cancun_menus.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/you_are_a_badass_at_making_money_master_the_mindset_of_wealth_summary.pdfIn PDF document text
    • http://sojosabomoki.22web.org/ancestors_legacy_guide.pdfIn PDF document text
    • http://bafezixulu.22web.org/59645149379.pdfIn PDF document text
    • http://vebilodugisugod.iblogger.org/heidelberg_cement_bangladesh_annual_report.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/rofujotekutezuvulijotonun.pdfIn PDF document text
    • http://leftoutclub.com/81987504495ee0po.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/86805770648.pdfIn PDF document text
    • http://cmb-societe.com/how_to_write_a_reader_response_essayztu21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/gelakosamizisunavajireso.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/rafebusenodakaranef.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/wubomipalo.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/89399607500.pdfIn PDF document text
    • http://vukenorap.epizy.com/87850021880.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_off0000ee50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE50 4924 bytes
SHA-256: 5d1a68e1bb1b328b20179f50fba8f783af1e41ec82e7025724f921cd1451bc3e
font_01_sfnt_off0000ff24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF24 10260 bytes
SHA-256: bdca7728223e8cdfe367acbc2e1075788fdeddf693698798d7dc02aea2791d08

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