Malicious PDF — malware analysis report

Static analysis result for SHA-256 59bb0085edf6eec7…

MALICIOUS

PDF

75.5 KB Created: 2021-02-22 01:01:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cc289aeb2dbd15528d433db7743e570c SHA-1: 9c7da5aa5e3b61e0053d6d56d8161add4da8264f SHA-256: 59bb0085edf6eec7b283dcc2f02475f9ea9803b5d297f7f0d130bf556b98b5d8
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 0.9996

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/123?utm_term=how+to+order+a+child+support+debit+card PDF link annotation
    • http://walkover.me/898731110814h64s.pdfIn PDF document text
    • http://albl.ru/78114537007vrt98.pdfIn PDF document text
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/6491248.pdfIn PDF document text
    • http://zoompol.xyz/ribivoxituxisomugum9wf0u.pdfIn PDF document text
    • https://cdn.sqhk.co/zibomevuguli/eggAgc3/75594226646.pdfIn PDF document text
    • https://ranitezal.weebly.com/uploads/1/3/1/4/131438109/ebab10791b7.pdfIn PDF document text
    • http://newser.site/5382761354wuakx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451033/normal_5fdee480e975a.pdfIn PDF document text
    • https://pemilixip.weebly.com/uploads/1/3/5/3/135330450/5256206.pdfIn PDF document text
    • https://cdn.sqhk.co/livefivepa/FjgerGB/80965665255.pdfIn PDF document text
    • https://ronupajowosoza.weebly.com/uploads/1/3/4/8/134871490/basijegikoxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452865/normal_5fee13aad2fe3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502906/normal_6017874cb5acb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425514/normal_6032713c48ccb.pdfIn PDF document text
    • http://persequen.com/miloz744d9.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/kovilowab/juvode.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/rapalumitiwofabe.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/wusuzutegasuzegig.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/58994497937.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/facebook_lite_apk_terbaru_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/bilezulimufivuxotazukawuf.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_off0000eb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB86 5356 bytes
SHA-256: f7e455220af6a1031592dc14ad39950b6bf39246330a4bdd65a9e2600950c883
font_01_sfnt_off0000fdbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBB 10148 bytes
SHA-256: d3628b2e4a880771ac061bf8f159784d5c50613d181d6f14d8fcec7cd17a0070

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