Malicious PDF — malware analysis report

Static analysis result for SHA-256 225758b11d3916ac…

MALICIOUS

PDF

64.0 KB Created: 2021-02-06 21:56:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1bf8299aab3d474f46a4ab45599678a0 SHA-1: ae3175a5e372e77c1b7594e623c0ee1a7a500fd0 SHA-256: 225758b11d3916acaa1572867a3119f6303f1e15a4c5d5ab498fbfb157725a51
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, which is likely intended to trick the user into downloading a secondary payload or visiting a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'healthcare industry report'. No scripts were extracted, but the presence of external URIs and the malware classification strongly indicate a phishing or credential harvesting attempt.

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://jottigo.ru/aws?utm_term=healthcare+industry+report PDF link annotation
    • https://cdn.sqhk.co/naxopesareg/0tgdzhd/ocado_christmas_slots_sold_out.pdfIn PDF document text
    • https://cdn.sqhk.co/xesozugis/idRgjyo/49281038491.pdfIn PDF document text
    • http://latencfsrt.space/mireragobukonigomr92o.pdfIn PDF document text
    • https://cdn.sqhk.co/wunasesev/JLYidct/85428240444.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwovodegi/hiibJhD/diablo_2_infector_of_souls_help.pdfIn PDF document text
    • https://cdn.sqhk.co/rarirawibowo/1eYjdhg/light_trails_ios_app.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwiketi/j3VHghE/indeed_job_search_login.pdfIn PDF document text
    • https://cdn.sqhk.co/ronuwimo/dTyiujc/49893204593.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/bjdihJv/koregujoteg.pdfIn PDF document text
    • https://cdn.sqhk.co/wabajevebe/g3YhinI/bugis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/rv_buyers_guide_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A2 5108 bytes
SHA-256: 0e4ed8fa508095f17a5b198743f025592ea913f84d233c0b23dae8f58be73c2c
font_01_sfnt_off0000c3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3ED 9708 bytes
SHA-256: 3e11e02d96dc523b680f6274b13ad71aca15f4ce381ba2598dca09788a04a24f
font_02_sfnt_off0000e532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE532 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378