Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc693cea755b0dbe…

MALICIOUS

PDF

85.3 KB Created: 2021-06-11 09:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4fae1ed4780ffe467425e05bfd4d7d29 SHA-1: 900033444c364b1dd4b357de0698ca38c90d7a4b SHA-256: fc693cea755b0dbe55d4d9dc52dba0178a4ebe7ed316a91b1f07de50f3865708
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://drafthe.ru/pbw?utm_term=year+2+time+worksheets+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419847/normal_602403dd1dcd0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499633/normal_6009abfad2ff1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472186/normal_601883ecaa100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393369/normal_60212a4253659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469106/normal_605303c391d15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476126/normal_6038822eaced9.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4459468/normal_60b3b5fd0063c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_603582e163edf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380211/normal_5ffe6d1347e23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391954/normal_600e4a2c2f451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_606bab1030918.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/fe2419d3-523c-493f-8604-cbe8ab488105/94936633913.pdfIn PDF document text
    • http://vifogajo.pbworks.com/w/file/fetch/144607950/wojupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8595c801-5147-4325-8518-059fe1b298e6/vopuvobeberudamow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b570c15c-3e68-49ec-a808-2d0c59fd0ff1/kubesulelimoworapik.pdfIn PDF document text
    • http://lezakoliz.pbworks.com/w/file/fetch/144700758/russian_childrens_stories_in_russian.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94b49cad-0c74-4f23-bd63-2ace95ff8320/dixon_ztr_mower_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d900386a-3721-4009-8a37-0c5751527a78/kesuzazaxusasusabop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7d135a8-854d-4cea-b075-8cec6d117ae2/how_to_offer_to_pray_for_someone.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_off00011124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11124 5224 bytes
SHA-256: 0660e134692547a89d9f9b92b5f4f6b12c4b89ebebb19414955ce4dc1c6f92aa
font_01_sfnt_off000122d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D2 11028 bytes
SHA-256: daaae9883cacefea0cae7be3325a446b5623978a26b5da484191c38caacb28bc

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