Malicious PDF — malware analysis report

Static analysis result for SHA-256 57c7dbc7387f71ea…

MALICIOUS

PDF

89.2 KB Created: 2021-02-17 05:14:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: a93f6bb5e0e43d1f0adbc52f77710eb5 SHA-1: 9f444b7da9ecc65ac24e2d59fc1c440aa0e9fb81 SHA-256: 57c7dbc7387f71ea382eef9d7e848f6b125e0f146dd250f1f962b879859d4f18
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a callback phishing or tech-support scam. The document body, though heavily obfuscated, contains references to troubleshooting and technical terms, aligning with the heuristic indicating a callback lure. Multiple external URLs were extracted, suggesting the document may lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://seumenha.ru/aws?utm_term=powerwise+qe+48v+charger+troubleshooting PDF link annotation
    • http://acgmgroup.ru/android_emulator_screenshot_shortcutyenqo.pdfIn PDF document text
    • https://cdn.sqhk.co/niwexifa/ggjLlig/51098955639.pdfIn PDF document text
    • https://xiligori.weebly.com/uploads/1/3/1/4/131411896/1254359.pdfIn PDF document text
    • http://mosdendy.store/vanevoxigijenejawaw561.pdfIn PDF document text
    • https://gulezawajure.weebly.com/uploads/1/3/1/8/131858287/zijoba_zunud_mevipepego_sisuxujaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459322/normal_600e843235660.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/ib8ZUgj/33759719929.pdfIn PDF document text
    • https://duxegolukazokun.weebly.com/uploads/1/3/1/3/131398215/2be916aa637.pdfIn PDF document text
    • https://kelebewo.weebly.com/uploads/1/3/4/3/134359650/2db23357f2db1.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/9hghevE/galaxian_3_mame_rom.pdfIn PDF document text
    • http://manthoughtswebsite.website/voici_le_pain_voici_le_vinb369r.pdfIn PDF document text
    • http://alkim.xyz/2393673452hgr18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448121/normal_6006dc5f497ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471109/normal_601a40bae9df1.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/SshhAhj/tekixijara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380545/normal_600c9c780bdf4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409250/normal_5ff2dd059d049.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/tokit/paediatric_home_enteral_feeding_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/dakinudegurugidomavarajax.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/jasper_reports_encoding.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/tweakbox_unable_to_app_ios_12._2.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/99333267608.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_off000117db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DB 5760 bytes
SHA-256: e4877ef4624bb162f21b644fe3a9bd3d6b78e02301d65d9fb56b176ae0ebfea1
font_01_sfnt_off00012b97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B97 12628 bytes
SHA-256: 53ae98ed26ce01881de975e40d32cfe9079a91c57e419d7be71b85fd1a2f4395

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