Malicious PDF — malware analysis report

Static analysis result for SHA-256 26dc3824d6745efb…

MALICIOUS

PDF

121.4 KB Created: 2021-06-11 19:28:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b74645bf0dfe1c67ed1553f1fccbe714 SHA-1: 41d40c688ebea906e3388785119bbc7616048dc5 SHA-256: 26dc3824d6745efb68d308396cc9cc5d92007be287b3e3d217b7de02bbd2afab
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 0.9999

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://synerhu.ru/pbw?utm_term=cruel+angel%2527s+thesis+piano+easy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375357/normal_6011b7827d63c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500911/normal_5fd82353c1dc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464730/normal_5feed756acfa0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381532/normal_5fd155e71d02a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_604de992c79cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410730/normal_5ffe824aa4efb.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/4f43eeeb-c23b-4794-8019-69b826d3a215/xarigusis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47a070ba-e515-49bf-b267-c11871a065f3/xefizeliwekimemod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af97b73-469e-4b87-8130-436b1e63790e/64683740730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14d794b7-6a85-422e-baae-fb86b240a29a/malaxiwepisowunupatom.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/f/o_que_investir_em_2021_com_pouco_dinheiro.pdfIn PDF document text
    • http://genarozep.pbworks.com/w/file/fetch/144490176/how_to_prepare_for_upwork_readiness_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/793d6ad7-a56c-4791-99d5-f74766ceb484/marlin_model_81_dl_owners_manual.pdfIn PDF document text
    • http://rixepal.pbworks.com/w/file/fetch/144517470/white_county_warrants_arkansas.pdfIn PDF document text
    • http://febigadeviti.pbworks.com/f/32867775350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c2267a7-6121-4807-96bc-71696b9911f0/basixapuf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000179b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179B9 9024 bytes
SHA-256: 9fa2c07ea1367da0d51fe1cdfd862e915710cf96bd20980e5b1309f9f22df106
font_01_sfnt_off0001985b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1985B 5124 bytes
SHA-256: ffcb672b35674d417fe6a6ca63f889857f6e0ce2da7c7203d27982e4dfa1e4c2
font_02_sfnt_off0001a9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9CF 14488 bytes
SHA-256: c3d6169a457a4a88c04d23bf258796602768d4d0f6aa3982ebf037feb5264f83

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