Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bbf10e20a189f20…

MALICIOUS

PDF

76.4 KB Created: 2021-04-03 16:38:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c35b374a29bd92bd39eaaa01386f9a92 SHA-1: 5262191014b3788dfa234664bef914c0f9f71b24 SHA-256: 3bbf10e20a189f20214c2a55af3017ebbad509eaa97dff8d89a3f17dd4b16810
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://jottigo.ru/wix?keyword=empyrion+guide+alpha+12 PDF link annotation
    • http://idealslim-ordina.site/glencoe_history_book_answers39ga8.pdfIn PDF document text
    • https://boxagabopevonud.weebly.com/uploads/1/3/4/3/134353696/1878dbef312fc50.pdfIn PDF document text
    • https://cdn.sqhk.co/nodujugebi/bnhduie/srs_app_installer.pdfIn PDF document text
    • http://wumiwuzigimo.mywebcommunity.org/movement_sensed_automatic_door_opening_system.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/igrOYii/ruwugugije.pdfIn PDF document text
    • https://kedixusivazusug.weebly.com/uploads/1/3/4/8/134869684/2ffa80b.pdfIn PDF document text
    • https://jedujidiki.weebly.com/uploads/1/3/4/3/134352610/7776183.pdfIn PDF document text
    • https://cdn.sqhk.co/gasowifozil/Amq1qge/10622702589.pdfIn PDF document text
    • http://pekefosijemibi.sportsontheweb.net/dubai_tourist_map.pdfIn PDF document text
    • https://gitakitopawal.weebly.com/uploads/1/3/5/3/135325500/7e2c6ee85b727c4.pdfIn PDF document text
    • https://dopilefuma.weebly.com/uploads/1/3/4/7/134733068/woxutivixub-mopumaf-xugovari-sulamobiguxugo.pdfIn PDF document text
    • http://gnoogle.site/vupijwzdnx.pdfIn PDF document text
    • http://lotsmen.com/47570146202xfo7o.pdfIn PDF document text
    • http://dipugipedanam.sportsontheweb.net/alejandra_stamateas_libros_gratis.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/3f1d36ba-c95b-4662-9ef0-3db1f31fd115/terujigis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dc4fc43-0a48-4f77-9783-2f92552fc827/sotepijirutarazila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85529522-cf44-4920-8c15-215befbd4389/41577649123.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_off0000ec92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC92 5436 bytes
SHA-256: c963e8617dd88bb51f5f649d2a7345e208bb72a354d8f221419ca843895ebb1e
font_01_sfnt_off0000fef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF1 10644 bytes
SHA-256: 3189fc9ea1d94eff212729811c2ef7f17e3cb8cb9a8422ecf5861f93a4e7d87e

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