Malicious PDF — malware analysis report

Static analysis result for SHA-256 68746212a472cbf4…

MALICIOUS

PDF

98.2 KB Created: 2021-02-28 19:51:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 27c94ac89eb9836a0ec4eecdcac1a81a SHA-1: 9ca25254b13ebe024503b924c19880d46055b2a3 SHA-256: 68746212a472cbf4da8ae57a78ac2c474b4661e29a0dfb1feaf8aa60bac7ad7a
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://golowaki.ru/123?utm_term=christian+pre+marriage+counseling+books+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408996/normal_600d89ac540a7.pdfIn PDF document text
    • https://doritader.weebly.com/uploads/1/3/4/8/134885844/dazexuvix_duxavobutos_raxopi.pdfIn PDF document text
    • https://vaturelola.weebly.com/uploads/1/3/4/7/134704713/bawet_mabuforelakebuk_vewib.pdfIn PDF document text
    • http://juilopkiretlo.ru/music_theory_worksheets_opush9dn9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_6038301bbfe71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483623/normal_600d39b342c1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371272/normal_6002b087477e8.pdfIn PDF document text
    • http://telunodet.22web.org/revilijuzutarejoponabudu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408582/normal_6006120bac984.pdfIn PDF document text
    • http://tazaros.iblogger.org/pidobubamo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sinodigewenewe.rf.gd/tamil_caller_ringtone_free.pdfIn PDF document text
    • http://verepuremi.rf.gd/xonamurafimonupoguwaxi.pdfIn PDF document text
    • http://namavorudil.epizy.com/17395728003.pdfIn PDF document text
    • http://rupokabimizoju.rf.gd/59677515473.pdfIn PDF document text
    • http://binawojojin.epizy.com/98043478028.pdfIn PDF document text
    • http://jabelakejirer.epizy.com/police_report_crime.pdfIn PDF document text
    • http://zufarelizija.epizy.com/nigubino.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_off00014145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14145 5680 bytes
SHA-256: ac9b4dd9fb603c6434bdd6057129c6ac9142338a6a0f948e13861566f06788d2
font_01_sfnt_off00015464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15464 11580 bytes
SHA-256: ccd81d6629bfb91f85b6f69d962e19efddc6e9f3a4fd16858b96cdf373b41d8f

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