Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b3667b8e36eae7…

MALICIOUS

PDF

92.5 KB Created: 2021-03-23 08:58:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: be222bbcc3c5896862687ce24138c241 SHA-1: 237370e96a9aaf911e8b07c4b97649f079a59587 SHA-256: 94b3667b8e36eae71a83e333420784214eaabf58b56b590896e2b4e7ad7590f2
126 Risk Score

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 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=dodie+cello+sheet+music PDF link annotation
    • https://cdn.sqhk.co/xejudawadoni/5icmGhi/1668299460.pdfIn PDF document text
    • http://sidumila.iblogger.org/mckesson_reporting_portal.pdfIn PDF document text
    • http://katipef.medianewsonline.com/zesimuvejekedoloz.pdfIn PDF document text
    • https://cdn.sqhk.co/tunixomaj/lGhbjaY/harrison_bergeron_11_questions_and_answers.pdfIn PDF document text
    • http://disupiwalu.mypressonline.com/kuriwerez.pdfIn PDF document text
    • http://rijexofugovu.medianewsonline.com/1993402597.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/jLu73ji/6584095381.pdfIn PDF document text
    • https://cdn.sqhk.co/raxavetaletu/IIgejp3/fijojolekomimozukeg.pdfIn PDF document text
    • https://cdn.sqhk.co/jisokemefaz/WicicMs/panda_jungle_bubble_shooter_online.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://uploads.strikinglycdn.com/files/5343a846-0e0f-417b-aede-683425833c28/rikki_tikki_tavi_story_summary.pdfIn PDF document text
    • http://jajunegetilu.rf.gd/aashto_tp_70_free_download.pdfIn PDF document text
    • http://sajatuvireguta.atwebpages.com/kivemisajamogowatewatamun.pdfIn PDF document text
    • http://tulixiwubov.epizy.com/how_do_warlock_spell_slots_work_with_multiclassing.pdfIn PDF document text
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_68bce771f2634108b6853c3689b6ac2a.pdf?index=trueIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_51c15d3917034710989f457f25f7cd93.pdf?index=trueIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_9dbf7ea7fb7c4f22ab46b54609bf3166.pdf?index=trueIn PDF document text
    • http://vitafunajubala.rf.gd/57425662841.pdfIn PDF document text
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_3a0c0885d7d54d2f888b080943227179.pdf?index=trueIn PDF document text
    • http://dolapevina.rf.gd/vertical_center_transform_translate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcbeeba6-d340-490b-af86-bbf080734f8f/56302627126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0393da72-6af0-4e65-a52f-c890185fe546/91590750723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ed0e048-1595-4617-afeb-0acef7951974/xavalofabud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d67a7f6b-78c9-4e12-92f7-6c4d5dfcd4c4/55954500200.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_off00011f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8F 4648 bytes
SHA-256: 1b6b5a81740a3c693e9e8a3e9c08cd983974a0b744ec3336d69b9345f059a5f1
font_01_sfnt_off00012f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F63 11252 bytes
SHA-256: ddd14d0743bdefef93b79de682f144dda2d872daa9fec881afd1698159f16b83
font_02_sfnt_off0001560a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1560A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34