Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0001e006b2caa00…

MALICIOUS

PDF

132.4 KB Created: 2021-03-15 14:14:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 40bf644949f957aaf8f8dc300ec0db6c SHA-1: b201072af8bfcf05d8d400c4f2de2a35f2f10f9e SHA-256: b0001e006b2caa00b86c6a56ff1a6abdd78132a727932b9c0d5daa83633d0dc2
156 Risk Score

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 0.9996

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://xajibur.ru/wix?keyword=dhcp+l2+interview+questions+and+answers+pdf PDF link annotation
    • http://save50it.pro/54695322150b0s8q.pdfIn PDF document text
    • http://lozomunige.iblogger.org/pixosifodunoboworivono.pdfIn PDF document text
    • https://cdn.sqhk.co/fogibadeku/ygfha5q/16_player_mini_battle_royale_map_code.pdfIn PDF document text
    • http://testrun.ru/36848477844bipeq.pdfIn PDF document text
    • https://cdn.sqhk.co/gegenosuzun/ahcgfhd/kim_kardashian_hollywood_mod_apk_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/papusabefo/8rhdjcw/30213737138.pdfIn PDF document text
    • http://zabavnyi-slon.ru/gavajopuv98h3q.pdfIn PDF document text
    • https://gupufema.weebly.com/uploads/1/3/4/4/134456882/pekomiposazaposavozo.pdfIn PDF document text
    • https://sagerogokijisoj.weebly.com/uploads/1/3/4/6/134601402/b6d736be539.pdfIn PDF document text
    • http://mylevel.store/783928135052iwha.pdfIn PDF document text
    • https://tuzokoluxalof.weebly.com/uploads/1/3/1/3/131382257/3275570.pdfIn PDF document text
    • https://maparezoja.weebly.com/uploads/1/3/5/3/135321508/8453697.pdfIn PDF document text
    • http://ueuniti.xyz/1794-ie8_manual5yr7j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/7096562818.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/88425369007.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/technical_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/naxevexake.pdfIn PDF document text
    • http://jadizugexagosor.rf.gd/mefimutagulenu.pdfIn PDF document text
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_e26118a530a845d9b6a62dbc0d3ae8ea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dosipive/rebikurukifekaman.pdfIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_844bcd282be94da28d786417a7e9c678.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B34E 5652 bytes
SHA-256: 6b4c97e6b9614664e26aaf074dbec4880cab1fdca0965c6d89a9f9d51d502ba7
font_01_sfnt_off0001c69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C69E 11148 bytes
SHA-256: 3191eb7d87a9e03e39c88b07bbca08e415be5ed27343acfbd14c4c9ed3366bd3
font_02_sfnt_off0001ecb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ECB5 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e

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