Malicious PDF — malware analysis report

Static analysis result for SHA-256 824e0ad028fde122…

MALICIOUS

PDF

78.3 KB Created: 2021-03-15 18:48:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 66587c9f6b08cff5f9237f49cda36ea6 SHA-1: 816f079f46a812cab12dbdd0021788b348443932 SHA-256: 824e0ad028fde1221c216c69bef025e3d43e2e25bc53e89a0954db00e42d0c25
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://dugedepap.ru/wix?keyword=texas+go+math+grade+2+answer+key PDF link annotation
    • https://sobopagep.weebly.com/uploads/1/3/0/8/130873740/zezerijig.pdfIn PDF document text
    • https://jetisinodab.weebly.com/uploads/1/3/5/3/135335938/xabufepubebapemubema.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458161/normal_6009ff0dd3ced.pdfIn PDF document text
    • http://pek-24.cc/vijeruxobegesamixogej9lchj.pdfIn PDF document text
    • https://mezikemopirexat.weebly.com/uploads/1/3/5/9/135993778/renila_xirotuvadomes_lakifovegutamuw_vumobaput.pdfIn PDF document text
    • http://zeboxagekej.sportsontheweb.net/94995552646.pdfIn PDF document text
    • http://spencermcman.us/36406878840fs0n5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471723/normal_5ff324fc481d8.pdfIn PDF document text
    • http://copytoshka.ru/5523006249443jwl.pdfIn PDF document text
    • http://rowaxamapitowej.getenjoyment.net/11260486011.pdfIn PDF document text
    • https://timakopazasiri.weebly.com/uploads/1/3/4/4/134445807/lobiwafitib-zijorijopovat.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/what_is_skeet_choke_on_a_shotgun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446496/normal_604f785f3f581.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://041f977c-1598-48cb-b578-3d63f550c8ab.filesusr.com/ugd/524ae3_3c092972a9ff4298a78d0e0e4c71ac12.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8248511e-c0f7-4a5c-86df-4ee9ece9d6e7/a_confederacy_of_dunces_chapter_5_summary.pdfIn PDF document text
    • https://146c8b6c-0b46-450b-8ed0-b45f1e2a4974.filesusr.com/ugd/b58d21_e1f56251287f4f1e8e78260d94bff518.pdf?index=trueIn PDF document text
    • http://vidugozu.atwebpages.com/how_to_backup_windows_10_operating_system.pdfIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_e45745ab0e7e4a9da569c89f5224bee1.pdf?index=trueIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_5c70ca395e124931bb8c05dff1e94aaf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3255ae1b-729b-4359-9324-55505ff9f933/gufosoniratozi.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_off0000f079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF079 5616 bytes
SHA-256: 625d5c0084d58a09d9e152e29de3d79331bbf8840c8af3cf2785bffe4091fee0
font_01_sfnt_off0001038c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038C 11708 bytes
SHA-256: 9978b9ac52a4ffb24a5a31391616e3baebfef3f460934b9fff2fa6bd07ee319a

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