Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a6236e59c532dc…

MALICIOUS

PDF

76.4 KB Created: 2021-03-03 05:49:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 96ed7484a9d895f8229e0e66c8d648a9 SHA-1: 1b0970fcac5ac745248c1bb7d0af9aef278a8068 SHA-256: 98a6236e59c532dc4549add4d5a4f708c52dfd752433c45a1f0ec184488e78c1
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 0.9998

Heuristics 6

  • 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.
  • 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://jumiwimov.ru/123?utm_term=how+does+the+cognitive+approach+treat+depression PDF link annotation
    • http://suzupuwejal.mygamesonline.org/12379550471.pdfIn PDF document text
    • https://cdn.sqhk.co/zotipimesaza/jhijfha/74268027828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417313/normal_601b39ebb11a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459776/normal_602f84cf79a17.pdfIn PDF document text
    • https://vutuwoti.weebly.com/uploads/1/3/4/7/134720014/789709ac9726ba1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485703/normal_5fee890797ad4.pdfIn PDF document text
    • http://vetebozo.mypressonline.com/film_genres_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383128/normal_6036a9232ad0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369311/normal_60152e77504aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419847/normal_5ff8632c63bef.pdfIn PDF document text
    • http://jolijivik.scienceontheweb.net/15158051662.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495264/normal_600c1c2465221.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vexabimumemig.atwebpages.com/how_to_write_out_a_dd_campaign.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/2000_kawasaki_mule_550_top_speed.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/karnataka_6th_pay_commission_salary_calculator_format.pdfIn PDF document text
    • http://jotudokizer.onlinewebshop.net/best_offense_vs_3-2_zone.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/photo_editor_new_app_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/17101234057.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_off0000edfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFD 5416 bytes
SHA-256: fa54c69a0058362ac3d152097cf4dfd81bf1757c8e294d3c189c7c6c6532ef18
font_01_sfnt_off0001007e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007E 10344 bytes
SHA-256: 4e00383c58aa0fd5fd750d0e06fff2a6ae22988175476f1b4c009ef2c1542fe9

Open this report in the interactive analyzer, or submit your own file for analysis.