Malicious PDF — malware analysis report

Static analysis result for SHA-256 a88d02c638327952…

MALICIOUS

PDF

67.7 KB Created: 2021-02-23 22:43:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: ff445683a1befb040deceb82712eb408 SHA-1: 5553854fedcdb1ebde054bd5206d242bc276fa37 SHA-256: a88d02c638327952f78c9c75ec5f473ad192d998aa810f1cc6ac23b642183b08
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The PDF structure and embedded content suggest an attempt to disguise malicious activity.

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://druttle.ru/strik?utm_term=george+foreman+grill+removable+plates+25360 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4425238/normal_5fc7c79d5730c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402722/normal_5feb6c9636f61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451228/normal_6020b57632b3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378857/normal_60192bb176460.pdfIn PDF document text
    • http://kulokozataxat.22web.org/free_lesson_plan_templates_for_preschool.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493916/normal_5ffac8d3b9b09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421051/normal_6001030229f41.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://depebovibu.epizy.com/jigani_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/how_much_does_keto_diet_plan_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/42241771941.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/64542767574.pdfIn PDF document text
    • http://suvumudupese.epizy.com/wowusidodagixomeferes.pdfIn PDF document text
    • http://vumafovixono.rf.gd/best_free_weather_alert_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/arithmetic_and_geometric_worksheet.pdfIn PDF document text
    • http://zudozam.epizy.com/78957888799.pdfIn PDF document text
    • http://ropedeni.epizy.com/barbie_girl_song_remix_free.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_off0000c809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC809 6168 bytes
SHA-256: 49158b3587770e829cd1ec85e42d84b320191415eed6c3d12bd87dce98181bf1
font_01_sfnt_off0000dcf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF9 10204 bytes
SHA-256: b2502574bfdaf2ad84e9fd7f3e6345c81a0709b48207f384288f7a94281abb85

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