Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f4cad92caef433…

MALICIOUS

PDF

74.5 KB Created: 2021-03-17 08:25:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2a2705cf19df3e9fc7cefd8624e58b49 SHA-1: 95fcac5eb005a896be5e31bae051ac1a2ce635fc SHA-256: 70f4cad92caef43359f7d806fd7cbc4b58f71ac2dc1f17a6b58c7e2b00a2a158
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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 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://pelibifir.ru/strik?utm_term=the+wu+tang+clan+name+generator PDF link annotation
    • https://topuzuxet.weebly.com/uploads/1/3/0/7/130739133/7296425.pdfIn PDF document text
    • http://micrometer25bill.site/android_sdk_26_linuxibv9d.pdfIn PDF document text
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/d16d9719c64ec8.pdfIn PDF document text
    • https://wifusudufasebo.weebly.com/uploads/1/3/5/9/135992472/e58f4ffeb92a15d.pdfIn PDF document text
    • https://cdn.sqhk.co/wulozonixuf/jeFif1G/pipamabaredazaxifu.pdfIn PDF document text
    • https://cdn.sqhk.co/dojopaxitovi/hyhcQSy/14019315239.pdfIn PDF document text
    • http://limecash.xyz/titoxitinifoddym3k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456389/normal_60311efd60193.pdfIn PDF document text
    • http://nokojatagi.mywebcommunity.org/cracker_barrel_menu_breakfast.pdfIn PDF document text
    • http://zavemobavozake.22web.org/hospitality_management_internship_report_sample.pdfIn PDF document text
    • http://maslovauto.ru/retro_bowl_tips_runningygv04.pdfIn PDF document text
    • http://nicepics.xyz/87387686896rxcjw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405420/normal_5fca90ee1cc11.pdfIn PDF document text
    • https://cdn.sqhk.co/siganewita/eROFheU/lose_belly_fat_in_2_weeks_workout.pdfIn PDF document text
    • https://venipasor.weebly.com/uploads/1/3/4/5/134584053/sarimadelib-zajuvotepi-donoloxuvud.pdfIn PDF document text
    • http://wuvevaj.iblogger.org/bopugifusosiwejo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wunekoxewufomaf.epizy.com/dremel_400_xpr_kit.pdfIn PDF document text
    • http://wovefekekixuji.rf.gd/nominurivomomotirelixupe.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/portugues_de_portugal_para_estrangeiros.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_off0000e44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44A 5076 bytes
SHA-256: 99246730431a7f604a21fc92b8ec025a4b549cbc4e776d834f82717d7048965b
font_01_sfnt_off0000f57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57A 11544 bytes
SHA-256: ebece035d3c74bdf48e918eb2068461955ff636c948e7a8f0dc01bfc71cda9ce

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