Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0b2a8c8480edb8…

MALICIOUS

PDF

77.0 KB Created: 2021-05-06 08:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c55f36dea219608dfef3b4a0fc036cb8 SHA-1: 19ff08ea57bc6c209c496d52408aa542c46f124f SHA-256: 2e0b2a8c8480edb8e230082c978b48851dea69b2aeb91579956cb59f2dd48e6f
186 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 0.9993

Heuristics 6

  • 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.
  • 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://botokaw.ru/strik?utm_term=how+to+charge+wahl+trimmer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485578/normal_6047abd945295.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449014/normal_5fdb341ae2b05.pdfIn PDF document text
    • https://cdn.sqhk.co/zedozomi/fHgeNX9/ludo_champ_game_download_jio.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530990/normal_600db4bf83f32.pdfIn PDF document text
    • https://cdn.sqhk.co/kofelejezem/jbhfVf1/amazon_warehouse_assistant_reviews.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465938/normal_6019baa1871c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460680/normal_5fe6a4c4990aa.pdfIn PDF document text
    • http://barcaporirternet-interbank-pe.com/backup_camera_app_for_android_phonejvhtb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480886/normal_6056b77f71473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382187/normal_6023af0bb42d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451950/normal_602d744c9f02d.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/jigieDV/53413856146.pdfIn PDF document text
    • https://cdn.sqhk.co/rixutixim/ahJiics/8908254812.pdfIn PDF document text
    • http://gukibiminaz.iblogger.org/cema_belt_conveyors_for_bulk_materials_7th_edition.pdfIn PDF document text
    • http://mebelrostov.ru/loturagow1pxmr.pdfIn PDF document text
    • http://proba7.xyz/mental_status_examination_examplesbscge.pdfIn PDF document text
    • http://sosunimepewe.22web.org/zizetufemijufukata.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sevetise.rf.gd/61302508689.pdfIn PDF document text
    • http://genobobef.rf.gd/libro_degli_spiriti_allan_kardec.pdfIn PDF document text
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_aef3bedea9ed4088827e36ed5bec1262.pdf?index=trueIn PDF document text
    • https://78ff948a-0765-49f5-a22c-0fbe0eba7848.filesusr.com/ugd/888d0b_e0c6decd411945d4a5f3927adc1828d7.pdf?index=trueIn PDF document text
    • http://reronagut.epizy.com/sanyo_rice_cooker_3_cup.pdfIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_3b82b1e8e0a9418888ed8279ddabaebd.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF104 5088 bytes
SHA-256: ac0e7792e5fd0074ae86056bfdf93e22fe0fe7e28f12a00a96aec5e0b9d87118
font_01_sfnt_off0001023b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023B 10712 bytes
SHA-256: a1c4dd4406ccea3974b0a70e0da9d4b6102f2ad6073fdea037852982d9b84aaa

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