Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c25c3f464b07cf…

MALICIOUS

PDF

74.1 KB Created: 2021-03-30 14:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 25dca0698082ae3babec0388d46c9028 SHA-1: e00ea7923b09cadc62be2d985dd750c935b76049 SHA-256: 49c25c3f464b07cf653617641badf490ad35bc1950ee55fbdc1a24aa532daa57
156 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 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 0.9995

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=mystery+of+the+bones+answer+key PDF link annotation
    • https://dojomataz.weebly.com/uploads/1/3/4/7/134700303/208969.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/how_to_have_multiple_streams_on_twitch.pdfIn PDF document text
    • http://kejoxemubogese.mywebcommunity.org/notas_de_canciones_cristianas_en_teclado.pdfIn PDF document text
    • https://petugureb.weebly.com/uploads/1/3/4/4/134445868/7045353.pdfIn PDF document text
    • http://mukinokelek.mygamesonline.org/knee_exercises_for_seniors.pdfIn PDF document text
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/6974545.pdfIn PDF document text
    • http://xuxikurov.mygamesonline.org/aula_de_violo_para_iniciantes_passo_a_passo.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://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_8934c39b0379460d88f171eaddc3ae07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/gore_canyon_fishing_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a9153c6-8a4e-4ab5-9cad-fbf2bc4a1ee2/reribodokomemi.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/ziminuxanunaxopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe5d30c5-00bc-4945-b242-4a9dd4bb958f/schwinn_stationary_bike_170_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/what_would_you_put_in_your_time_capsule.pdfIn PDF document text
    • https://6cda4dd4-8aac-43e7-8003-7c0eea9f7907.filesusr.com/ugd/34e26e_b616ba165c634030a05aaf1717c9e3ab.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/aldermore_isa_transfer_form.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/52411898692.pdfIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_a3326cac05bd4e9982ea359f6841e695.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuponefi/vezuvebatezovilolonikugi.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/house_tree_person_test_description.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c965f11b-8f9a-47cd-904f-f96ba3cfb0e1/kenmore_quiet_comfort_14_humidifier_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/51819818989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2665208-c6dd-41e0-a72e-59c1fde34d30/nawokosazoledizisazese.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_off0000d895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD895 4968 bytes
SHA-256: 2efc6a7c8615a11d234e19cd3a88c1370a57af26f14823bd275bb5ef7e32e876
font_01_sfnt_off0000e987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE987 10696 bytes
SHA-256: 8e8ce901fee1f0bc89ee00b9fe4363f05b7305d4807bda45fb4016692cdc6e53
font_02_sfnt_off00010d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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