Malicious PDF — malware analysis report

Static analysis result for SHA-256 acaadc1283c0ba77…

MALICIOUS

PDF

62.5 KB Created: 2021-02-10 01:48:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 35a2d97b7533893a4be1843481639056 SHA-1: c6ce649f5766d0c577fa28eb5cdd713a59bbe064 SHA-256: acaadc1283c0ba77d174d2db7c52138e139c479d11677ce315b98764cfed6ff9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The embedded URL points to a domain that is likely part of the attack infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'simple clean powerpoint templates free'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/aws?utm_term=simple+clean+powerpoint+templates+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371787/normal_5fd2e40538323.pdfIn PDF document text
    • http://wofaguwere.iblogger.org/borderlands_2_salvador_solo_guide.pdfIn PDF document text
    • http://laura-egorova.ru/toddler_electric_cars_walmartvgz2i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457881/normal_5fe74ea638923.pdfIn PDF document text
    • http://kind-insta.site/800619163035cize.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497395/normal_60086d29ab6b0.pdfIn PDF document text
    • http://coloradocustomelectric.com/70981287346pmw50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419851/normal_6021f6db098ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zozezad.epizy.com/47431559576.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/indiana_jones_lost_ark_parents_guide.pdfIn PDF document text
    • http://sarozaxag.epizy.com/ghatshila_weather_report.pdfIn PDF document text
    • http://gogidovegesoxe.epizy.com/nizoxaseki.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/tor_browser_ios_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/14061532934.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/dark_crystal_age_of_resistance_characters_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/wakupaxofemivuvaruxulu.pdfIn PDF document text
    • http://pamakejexo.epizy.com/28402569332.pdfIn PDF document text
    • http://wolevovugubim.epizy.com/florida_llc_annual_report_due_date_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/nalusos.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_off0000b9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9BF 5356 bytes
SHA-256: 81d315fabdbb8f3d038cf456a75a2a9b9f002ba5479ab847a485a124faa23d68
font_01_sfnt_off0000cbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEE 9596 bytes
SHA-256: d8e3ecd27f983a68ec3d860bd11cca676f06e7539e3205c977e41265430b2e15

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