Malicious PDF — malware analysis report

Static analysis result for SHA-256 661757b2fd3c4ac7…

MALICIOUS

PDF

75.3 KB Created: 2021-03-20 18:18:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 074efe384d834b19854b9c5f11996783 SHA-1: b117b9919d9d3bbf5f4e9969cdb827b041b2c6aa SHA-256: 661757b2fd3c4ac791441a3dd6e7edfb6cf7d7f83c7c80cd7cda4c0870804197
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of external URIs and the overall detection profile suggest the document is designed to facilitate further malicious activity, such as downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=mfj-969+deluxe+versa+tuner+ii+manual PDF link annotation
    • http://rixiroremijiw.22web.org/4867728396.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/CeW8Yie/rimidozilitimonofitiga.pdfIn PDF document text
    • https://cdn.sqhk.co/narulaloro/ajaicwK/european_war_ww2_mod.pdfIn PDF document text
    • http://goropefixujifep.22web.org/gopinikejinawakori.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489245/normal_6046d9265115e.pdfIn PDF document text
    • https://cdn.sqhk.co/vejanozugova/JZiFDhh/24416516828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492573/normal_5fe8037864445.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b9dc66b-0b5f-4c86-aa0a-7349193b70f2/omron_7_series_wrist_blood_pressure_monitor_bp652_manual.pdfIn PDF document text
    • http://foxadawimuwewar.epizy.com/58658818591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05d48f9d-1d84-4e33-9b86-3c9922d8e75a/4761008184.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/linksys_ea4500_router_review.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/merciless_indian_savages_shirt.pdfIn PDF document text
    • http://sefatefa.epizy.com/htc_beats_audio_apk_no_root.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1186fc6-e0c3-4eac-b182-fa97e64b6cd6/gewasad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f3efa84-9926-4b8e-8819-1918b5ea335a/93254602714.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/virixavokilo.pdfIn PDF document text
    • http://wazododasexixak.rf.gd/car_accident_police_report_austin.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/29364199382.pdfIn PDF document text
    • http://jusisow.rf.gd/16335211997.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/12175067545.pdfIn PDF document text
    • http://tekarileted.epizy.com/who_sang_the_original_version_of_auld_lang_syne.pdfIn PDF document text
    • http://tunizalureb.rf.gd/banax.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_off0000e8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D9 5604 bytes
SHA-256: 10177bc1f9ea1b34a309d14294d74330c8a05cc6e1122d6538f21838dea5a973
font_01_sfnt_off0000fbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEF 10872 bytes
SHA-256: c106594289b901c23a1c7c0c9db227aa5894b8b5aa72046d4690d63ca8c1b7b4

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