Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f8f7f7deaf94a97…

MALICIOUS

PDF

77.8 KB Created: 2021-03-13 21:58:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0c9817c995330e501ad5b3848b21cd0c SHA-1: 95371dba48130327683740651d728be593d08107 SHA-256: 9f8f7f7deaf94a9730941d83fc37ab4ee6b63797c4fcc559ef086341afc7ef48
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=how+to+speak+good+english+conversation PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4466391/normal_5fc5d11d75ca8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414332/normal_5fd2f86c12ccf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481154/normal_5ff65f2338664.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403263/normal_602ce36ed093a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475872/normal_5fee04926506d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455660/normal_5ff46636badbe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366327/normal_5ff3fd27de6ba.pdfIn PDF document text
    • http://jifixadilo.22web.org/vixotal.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/21a17686-f56a-4805-8848-f5e5c3b199e7/gatoremamixofokigekepo.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/8115359020.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/xugamaxaxuge.pdfIn PDF document text
    • http://wazinupizut.epizy.com/7817872656.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea9b5445-0883-4a2b-b61d-0ddb2ac55bd9/97653352940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b5f4ed9-0f05-4409-8544-93815b146237/excellence_riviera_cancun_food_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2aee86c-b06f-4345-a987-5047b3e13cf5/what_does_termination_mean_in_lawsuit_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96c9b59e-1140-4a70-9cde-0d726d60326c/41982250991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38c70411-8720-4e4c-8222-96d2e66730f9/kenmore_80_series_gas_dryer_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c669dce8-8ce9-497d-8b96-d1325a038cf9/74498446782.pdfIn PDF document text
    • http://refesare.epizy.com/bathroom_designs_for_home.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/roasted_chicken_and_vegetables_sheet_pan.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/maderexofasolov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df1c2402-9f00-4c92-a5fa-c366ae28c8ba/does_silence_of_the_lambs_say_hello_clarice.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_off0000f2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D9 5512 bytes
SHA-256: f8826f61019caeaddd8f3bdb61905cc83df2c229208fe8f9868cac43251bdd65
font_01_sfnt_off000105ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AD 10476 bytes
SHA-256: f2346204c236e7bbfaad98080a1fe0642f4c2f939261d871fac2d17fce986810

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