Malicious PDF — malware analysis report

Static analysis result for SHA-256 a19047f54657a2f6…

MALICIOUS

PDF

78.7 KB Created: 2021-05-17 09:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ed78314c38813133f346475bc2100f50 SHA-1: 8410df0dbf766059129bcac7c82c1933eaba73ab SHA-256: a19047f54657a2f6da4ec90c1f379ff995ec6903479d9ef68b8e72337c090452
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/strik?utm_term=how+to+connect+nutone+doorbell PDF link annotation
    • http://domotoj.sportsontheweb.net/arthurian_cycle.pdfIn PDF document text
    • http://lobubomevan.22web.org/women_s_luxury_gift_guide.pdfIn PDF document text
    • http://zolijava.iblogger.org/bernardo_stamateas_libros_quiero_un_cambio.pdfIn PDF document text
    • http://vojemodipu.sportsontheweb.net/rekopixaragudetole.pdfIn PDF document text
    • http://milatepe.medianewsonline.com/liwejoros.pdfIn PDF document text
    • http://gopubewigofopa.iblogger.org/videoder_video_uptodown.pdfIn PDF document text
    • http://tanidoxipasodot.22web.org/abc_analysis.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
    • http://xidatozekef.epizy.com/72021042722.pdfIn PDF document text
    • https://f61a8d15-835b-4c36-a3db-e4ead73ab13f.filesusr.com/ugd/e9f5f3_999e967a0aaa4554914b8d91528d111e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3c4c721-3ccd-4f23-a155-4976f19fc31e/strength_training_anatomy_2nd_edition_vs_3rd_edition.pdfIn PDF document text
    • http://jojogamuniwewiw.epizy.com/nevedadukixoxobimolidabim.pdfIn PDF document text
    • http://xisomusexiz.rf.gd/tales_from_the_loop_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cbf39b4-7359-42de-98ff-b7409a3316d6/sccm_pulldp.log_location.pdfIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_d7c802626bf24fc2818963f7ad38c80a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/honeywell_th5220d1003_non-_programmable_digital_thermostat_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/write_the_parts_of_speech_with_definition_and_example.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/72121765351.pdfIn PDF document text
    • http://dusameferadulo.onlinewebshop.net/castrol_gtx_20w50.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_off0000e5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E6 4572 bytes
SHA-256: 7e58bb9abfb265a348f78ee42b107bc8deed621fd4a78c2551312198e276f19d
font_01_sfnt_off0000f57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57E 11920 bytes
SHA-256: 6084611afec99dfa9bd8681428df69685af3dbad727f1d268f2de40a60d063cd
font_02_sfnt_off00011e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E17 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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