Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b8085927757002b…

MALICIOUS

PDF

66.2 KB Created: 2020-11-20 07:19:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f360b2b901c01797f5c66032acdee70e SHA-1: 906c6dcac2bccf9701116d8424b91d384d97b7a2 SHA-256: 9b8085927757002b59fc9c262c8bfecc1fbedd4eb4761298c87cc90fa898bf33
222 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, routes users through malicious redirector infrastructure and presents a deceptive download button. 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/strik?utm_term=lectio+divina+worksheet+pdf In PDF document text
    • https://kazigujexumakul.weebly.com/uploads/1/3/4/3/134320364/3518586.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/afefdc37-c469-451b-8bf3-9aa646b67640/vokivajapinoromoga.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/medical_report_format_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb9450c9-dba7-4430-969b-48f90a77071a/21321186370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/279ba64d-242e-4081-9d0e-5ac251f1fad7/xuveje.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/mens_ruby_rings_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/belly_button_song_veggie.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/daily_language_review_grade_7_answer_key_week_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a8c8de-752b-4717-9f05-9422e3294eee/bi_weekly_employee_timesheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/fruits_basket_2019_kisa.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/life_cycle_of_basidiomycetes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b61b11-5e3c-4c9d-8c75-5de520392756/92695125158.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/pafuwubazuborajetixijanat.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/sozawaxiruwisido.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_off0000c7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FE 5368 bytes
SHA-256: af1740e68235e6f653bf9a0e58e94c41b0feb5478b6d62197bff9a146338601d
font_01_sfnt_off0000da59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA59 9872 bytes
SHA-256: 77102840803003c5b697e280490530017f29d4f69f28092921b74147d525ff11

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