Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c95c4a52e5197b…

MALICIOUS

PDF

75.3 KB Created: 2021-04-28 04:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b1a61344bfedab477dd32180ab6178f5 SHA-1: 1ffaae124e8bf7dbb096f3c8cfb3100a3663b4c6 SHA-256: c0c95c4a52e5197bfe43636a35d2fbb6e2959ee100166927bf23e733fa492f98
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://bologen.ru/strik?utm_term=brute+lawn+mower+parts PDF link annotation
    • https://dibevoxatatot.weebly.com/uploads/1/3/1/1/131164568/0ccf2de65e7ee99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421207/normal_5ff42c2115b1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_601f88240065c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418963/normal_600754017695a.pdfIn PDF document text
    • https://nalavawe.weebly.com/uploads/1/3/3/9/133997318/xovupunizapeme_gapolopup_gituwus_tomitutum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459654/normal_60527f25bab7d.pdfIn PDF document text
    • http://kfnwejfnkwheklf.space/87209780419ki3vt.pdfIn PDF document text
    • https://jamofavoxaf.weebly.com/uploads/1/3/4/6/134698870/8018534.pdfIn PDF document text
    • http://megatorg.ru/zisawusegesaliwiv5hrse.pdfIn PDF document text
    • https://duvozeja.weebly.com/uploads/1/3/0/7/130739152/fufum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421036/normal_600d66f6d062b.pdfIn PDF document text
    • http://vakiduweg.mygamesonline.org/xopikogidexun.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/wukara/roloduxasazuxidaguxexat.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/how_do_i_connect_my_logitech_wireless_keyboard_k520.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/raluxowelevaseler.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/android_app_for_macros.pdfIn PDF document text
    • http://fajazimigig.atwebpages.com/activities_worksheets_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/scosche_bluetooth_fm_transmitter_stopped_working.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/dmv_audio_driving_test_ny.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/31053398852.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA97 5104 bytes
SHA-256: 79e23455bb406b0592ed70377e0c3863bde3cf073e93122ad0e6081d31076984
font_01_sfnt_off0000fbec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEC 10560 bytes
SHA-256: 461bee658718a2398d437e63e7223a7f2a0c8afbae25e11dae22314f85735c97

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