Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae78b9610f4c83d…

MALICIOUS

PDF

73.1 KB Created: 2021-04-03 20:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d4b103ef33a67740a7d7077360f0092a SHA-1: 54ab969cb9d6c35703084be2135839e72cfc4153 SHA-256: aae78b9610f4c83d9daffeae74958b9a4ea268e3f0d02cfc659ee6be2a37052d
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 0.9998

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://golowaki.ru/strik?utm_term=d%2526d+planescape+wiki PDF link annotation
    • http://laribij.scienceontheweb.net/banking_and_finance_awareness_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/cgj7zhb/emergency_room_nurse_practitioner_jobs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421360/normal_6058413255f07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411709/normal_5ff5cde2b339c.pdfIn PDF document text
    • https://cdn.sqhk.co/bidekidarub/gj6xW6L/nufokawofaluwiluvin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403414/normal_602af00fefd08.pdfIn PDF document text
    • https://cdn.sqhk.co/rifarako/ge2mij1/63568330217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476416/normal_601408ed3c97b.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/eaae61dd-cece-40e7-b6bc-90cc34ff8d71/4_purposes_of_police_report_writing.pdfIn PDF document text
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_8ca7545767e5488e823ea270642f42a1.pdf?index=trueIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_435f48c1c273470887b29fae66192fae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wejuvono/69187504025.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/kefuberavoxebakonuxot.pdfIn PDF document text
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_4dce1a2d43ad4e3db88d21a6921f7472.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/najubu/dsc_alexor_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d88dc78-2a28-410c-a7f8-90b074d69a02/love_in_the_time_of_cholera_movie_summary.pdfIn PDF document text
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_1d72992391104365a54f900ad9cc9330.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/unication_alpha_elite_pager_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60764ee6-ea7c-431d-ae66-d59bade29436/1997_polaris_trail_boss_250_top_speed.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_off0000e50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50F 4156 bytes
SHA-256: 3c306e0ec94285d13e87c04bb9d91e20e74eae243bb960c666b01ded030faf74
font_01_sfnt_off0000f33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33C 10588 bytes
SHA-256: d18a3d106588340f092e05169867e5faa71db9c0f898aeb9e2bb94ca8b3610fa

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