Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f71759e23f1ab80…

MALICIOUS

PDF

81.9 KB Created: 2021-04-06 01:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8715429b519f0ef6b992c20612a361b7 SHA-1: 4cb02f1d31c28c1cdad172ac9f762d2c0e9ac988 SHA-256: 8f71759e23f1ab80ec3834709826a555383a6ba16973f881d7dd17d73b1a33cd
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 0.9997

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 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://fokemale.ru/aws?utm_term=fundamentals+of+english+grammar+third+edition PDF link annotation
    • https://cdn.sqhk.co/vavewiminiv/ico3Ajf/rolomiwodele.pdfIn PDF document text
    • https://cdn.sqhk.co/butuxolevu/jcMhc8D/49803740484.pdfIn PDF document text
    • https://cdn.sqhk.co/walamalesumi/Jjdhdgi/drive_safe_lyrics_chords.pdfIn PDF document text
    • http://sevotapapi.22web.org/48755857711.pdfIn PDF document text
    • https://cdn.sqhk.co/konumapedowe/7ih75Jz/solapogudisaxabuxolul.pdfIn PDF document text
    • https://cdn.sqhk.co/vijukifezu/kiaajeB/ny_city_police_dog_simulator_3d_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_e9fbc2982ed441e7afcf28dc54f6dadc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kovezux/77885764465.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/6457183637.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/college_algebra_problems_with_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/libro_de_algebra_de_baldor_completo_para_descargar_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/9841037672.pdfIn PDF document text
    • http://biranon.rf.gd/76411686360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84196104-b711-4b64-8b65-cb690613a21e/the_cross_and_the_switchblade_synopsis.pdfIn PDF document text
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_fde97fabcb714f83b7249a7daed5c580.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/01b636e6-f986-4571-9348-30bb2fc99dc9/final_fantasy_13_strategy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/weekly_meeting_planner_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/wuzejir.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/pedal_controlador_line_6_fbv_express_mkii_spider_verse.pdfIn PDF document text
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_382865d31f844e8ca94c2137d6bae6d4.pdf?index=trueIn PDF document text
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_c34c59e66f7a4e3fa00307cee2dd1167.pdf?index=trueIn 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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EA 5276 bytes
SHA-256: b41cd89b95800a2703751326924bb0d2cffd8fc55fe3923c997055dea71b8f82
font_01_sfnt_off000112b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B4 11488 bytes
SHA-256: 2529ae94625e46cad1b6b46f2a893812fee2839c45f5913267d3a9f234249eea

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