Malicious PDF — malware analysis report

Static analysis result for SHA-256 71b25407426d7b0d…

MALICIOUS

PDF

66.6 KB Created: 2020-11-11 09:09:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: cd5abafb16eb08b283aa8be3a50925df SHA-1: d66b246aa5a60a048cce1710fd49bcce7ba33702 SHA-256: 71b25407426d7b0da2f338c6da5e23157bd93f61072be10316556262ebe2366a
96 Risk Score

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://trafftec.ru/123?keyword=to+kill+a+mockingbird+poem+on+scout PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/34d85928-b521-4062-98a0-c8ad5a1dc85a/dore_s_conversational_acts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17c1db8f-3ce5-4140-a220-8d9ed87034b5/83044038687.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/the_flood_runner_2_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5d64118-4caf-4d1e-beb8-682cf1b36ec2/scoutmaster_conference_worksheet_tenderfoot.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/emu_application_system.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/soul_eater_arachne_height.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f48abe08-aad1-4a88-bf3b-fe093c2a361a/rafupuwotapefam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b6d36be-93ac-46e1-952e-17d74ab9a931/nususizamot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f5feffd-9214-4538-be2e-0b0b97532533/jofoxivulotigozuposulel.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/paleolithic_and_neolithic_eras_shelters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67110e9f-545e-4790-a15a-41aef7a5691a/baxemadusodekolef.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/dsw_return_policy_on_clearance_shoes.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/1450420454.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_off0000c958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC958 5544 bytes
SHA-256: 0e490d54c9d8c77bfd47805f5338b6e36f5b786663107af215bf823d56be5f56
font_01_sfnt_off0000dc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC10 9868 bytes
SHA-256: 3b3c26e4b279dd027315de26831096455de5ac320c42cb3696a55aeb2221484e