Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b41467af2e4b1ed…

MALICIOUS

PDF

76.9 KB Created: 2021-04-16 00:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 23e04ed975cbb5963dc4e56bd54624dc SHA-1: b26261fdf28c635876874155a5dc1d2a40f3114b SHA-256: 8b41467af2e4b1edab7cb943551d6a17504658b16099e187c60257616ace8d7c
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 0.9993

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://mezovuduw.ru/strik?utm_term=does+aslan+come+back+in+prince+caspian PDF link annotation
    • http://tazizinujumijoj.mywebcommunity.org/mental_health_for_nurses.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464323/normal_6001bdfec628e.pdfIn PDF document text
    • https://potepivogatofef.weebly.com/uploads/1/3/2/7/132740463/ridabefog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408335/normal_60291b7c3a7ed.pdfIn PDF document text
    • http://rafewasugajeze.22web.org/68941510422.pdfIn PDF document text
    • http://goxutasabadatum.sportsontheweb.net/97363521599.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491671/normal_6009d17817317.pdfIn PDF document text
    • http://fuxuxixigu.scienceontheweb.net/wubefesogageriwidozam.pdfIn PDF document text
    • http://vawurabel.mygamesonline.org/2157561784.pdfIn PDF document text
    • http://xapizokawe.iblogger.org/bomberman_land_2_iso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367004/normal_5ff8ac0acee12.pdfIn PDF document text
    • http://nuwikivetajed.iblogger.org/56171159164.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428329/normal_5fd39c662e792.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/811dc1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/31f620fb-cf64-498c-bbc1-d8127596f6c3/casio_aw-80d-7avdf_youth_series_watch.pdfIn PDF document text
    • http://nasewuji.epizy.com/lefugud.pdfIn PDF document text
    • http://sojusenetuki.onlinewebshop.net/77060105581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/071a7f75-ab47-41cc-ad2a-eb8eab0c6be0/how_to_write_a_monitoring_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dfa5b14-8370-435f-8949-c019a9bb03f4/free_willy_2_streaming_hd.pdfIn PDF document text
    • http://leparitupoxow.onlinewebshop.net/katifu.pdfIn PDF document text
    • http://pofiron.rf.gd/ravutulonewamorozudimi.pdfIn PDF document text
    • http://nakarajibap.myartsonline.com/construction_of_dc_motor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb5f1f3c-4000-4746-9886-ab8380d031eb/97878459438.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_off0000f0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F4 5280 bytes
SHA-256: eb4aae43941a31e257c92088cf39043cc2e5f9cf45ae970bfd607ec2daad5a64
font_01_sfnt_off000102d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D5 10328 bytes
SHA-256: 4549ceaef7906ae367a775b55579e96c2b3451d41b8dffd7164e5cfb57eec06c

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