Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16c75cad24dc03c…

MALICIOUS

PDF

76.3 KB Created: 2021-04-15 22:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1394a99132f532e148b38a16d5545202 SHA-1: 22414b319ec2c52dd644b4343b1fbaa2a94cc176 SHA-256: a16c75cad24dc03c6ce6d03ca11fff197198449c880e46c05bdc81960190844e
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, specifically as a phishing trojan. It contains an embedded URI pointing to 'nipisod.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a card game ('Jeu de carte le kems'). No scripts were extracted, but the presence of external URIs and the overall detection profile indicate a phishing or malicious download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/strik?utm_term=jeu+de+carte+le+kems PDF link annotation
    • http://mapukapol.iblogger.org/89949101408.pdfIn PDF document text
    • https://febefadu.weebly.com/uploads/1/3/1/4/131453100/gowebizifinefa-vurudikumu.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/ijeNahc/71021927798.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/neigijj/50738756996.pdfIn PDF document text
    • https://kazuvamelu.weebly.com/uploads/1/3/0/7/130738637/7015488.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/L2jhbje/70552684522.pdfIn PDF document text
    • https://jupikojeba.weebly.com/uploads/1/3/0/9/130968920/nivosibidanufesuwepu.pdfIn PDF document text
    • http://guwumuwepoxujog.22web.org/boccherini_minuetto.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/rMHjeic/stress_balls_for_sale_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/pK6mZjb/shell_recharge_charging_points.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/tunenijexe/xaruduzilifotixitijumo.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/74992714884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f59427d2-a7b6-48d8-9e33-9a7424bd7808/living_sober_book_amazon.pdfIn PDF document text
    • http://jakosorer.epizy.com/validity_and_reliability.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/curriculum_vitae_format_for_undergraduate_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e64a16b-02e1-485c-ba75-d894b89ea475/23891689238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ea90d0e-0d72-4525-832b-3690d2051c36/76167245997.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/25211455234.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/methanol_chloroform_protein_extraction_protocol.pdfIn PDF document text
    • http://gelerajar.epizy.com/wixugurovatisegelig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eba98c9-f1fb-4488-b572-305ea22d0103/computer_programming_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/mass_effect_andromeda_biotic_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d05d43-ead8-45b0-b25e-c44c1dad8ea2/dc_national_art_gallery_hours.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/lasedavepixumuzupoje.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_off0000eaa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA2 5140 bytes
SHA-256: d687bfa4375f3413006ddbd201dcc40ee1c949b5aa61ed87ed207eb7a1633a2a
font_01_sfnt_off0000fc06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC06 12208 bytes
SHA-256: f3bd377d65c1d13e9f73577ca97eff9f8f7d6e314fd3377b004d679817e87805

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