Malicious PDF — malware analysis report

Static analysis result for SHA-256 88799c9df58b5dc0…

MALICIOUS

PDF

70.5 KB Created: 2020-12-15 16:47:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 11efd856e1eaa7233890845330a49166 SHA-1: 262bdb9436da07038f10b0fc05147010cde9c9c0 SHA-256: 88799c9df58b5dc0528f1f0268a74d45b7accb5eaa7e243868a1504dc3a3a907
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://trafficel.ru/strik?utm_term=undead+dragon+dnd PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f86f7560123d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f88d3191b338.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_5f94d69e10eea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393197/normal_5f8ec3398297b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370989/normal_5fcd75e2a42a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454430/normal_5fbb176fc9188.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf9621972c46e3c6511a6/1606285669886/49290310932.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36d523dfdd95b60e52950/t/5fc81f92d6e0cc37e33080d3/1606950803030/92580666636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab362772-31be-411f-8760-6221e192316a/luzadugipibi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd092b45ca4f790267c427/1606224174202/the_blue_danube_waltz_lyrics.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4dabec6d96458363b5a9a/t/5fcf032864290b1c3dcda8bc/1607402281011/refijiseresofixenafezikaw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64bd1be9b6939512f98cc/t/5fc701e8c7c45a5eaf9b94f0/1606877675436/football_games_2020_dream_league.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5781b6609fd0ee7b061d5/t/5fd68fc2481cfa31adcef993/1607897027598/74029329200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90bec853-d8ea-4511-8ae7-751ecfc1f0f4/sync_ipod_to_new_computer_without_losing_data.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB24 4436 bytes
SHA-256: f70e617d16a291ca2ad6b84fd096e7ab282b580e533d7baf7eb3fe6a0ac1d9d5
font_01_sfnt_off0000da24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA24 10964 bytes
SHA-256: 166984623be14600bccdd2b8564887c9138b6cd39fdc6ec06b62a436f93ebd8d
font_02_sfnt_off0000ff9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9C 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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