Malicious PDF — malware analysis report

Static analysis result for SHA-256 7665389ec4167b6b…

MALICIOUS

PDF

104.4 KB Created: 2021-05-17 22:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 53e96a47474dca33a924422d70dcdbbf SHA-1: 9be907c30c295757f5d5ad91029b05b8af693e50 SHA-256: 7665389ec4167b6bb2db5c1c99c123ba5bbccce01c468c566061bb9c59890549
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or content-luring attempt. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://ponafet.ru/strik?utm_term=interstellar+full+movie+in+hindi+dubbed+download+720p+worldfree4u PDF link annotation
    • http://vukabakoxipus.22web.org/suguriwapo.pdfIn PDF document text
    • https://rusipowesurajuk.weebly.com/uploads/1/3/4/5/134520473/mawugupabexewakivo.pdfIn PDF document text
    • https://baduzizexajozej.weebly.com/uploads/1/3/4/6/134653824/jerifajezesim.pdfIn PDF document text
    • http://zodoworusa.22web.org/pasugoba.pdfIn PDF document text
    • https://tutuludoj.weebly.com/uploads/1/3/0/8/130874598/jupewepurezegugi.pdfIn PDF document text
    • http://bawukafivawi.iblogger.org/pavalamanupi.pdfIn PDF document text
    • https://vesukinixemijuw.weebly.com/uploads/1/3/2/6/132696016/nizoz.pdfIn PDF document text
    • http://zibinonoja.22web.org/josofisifikumutibawaj.pdfIn PDF document text
    • http://ribupisid.22web.org/mawinumibakelafidemazo.pdfIn PDF document text
    • https://katozela.weebly.com/uploads/1/3/0/8/130874493/a2bcc3a858a4e1.pdfIn PDF document text
    • http://fetazobamu.iblogger.org/firotomuxagaj.pdfIn PDF document text
    • https://wawupibinotab.weebly.com/uploads/1/3/4/9/134900246/8fc166897.pdfIn PDF document text
    • http://xuwiropexij.iblogger.org/sonilatarovexodebuwunege.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/2704349.pdfIn PDF document text
    • https://nojokubovurob.weebly.com/uploads/1/3/1/6/131606526/lomovuve.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/ginutu/bukaved.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/apa_annotated_bibliography_format_6th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/career_development_goals_for_performance_review.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/39319191275.pdfIn PDF document text
    • http://rimadijek.rf.gd/zolobolotevu.pdfIn PDF document text
    • http://fopuxogajiwu.epizy.com/how_much_does_it_cost_to_update_a_garmin_nuvi_255w.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/focusrite_saffire_pro_40_vs_scarlett_18i20.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3B 11252 bytes
SHA-256: 8ffb67b897fed04b39e43b450792fccebd2176929aec344a55225eaf773bc10f
font_01_sfnt_off00012396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12396 5952 bytes
SHA-256: fc9a54f5a3ecac562edb42a79eeaa50dfac6655615dfdf536ae46575dd900391
font_02_sfnt_off000137c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C7 12480 bytes
SHA-256: 58f0993b6ae8e4b0a7131d7b6455ee65ae3c56590930888f4a7b0c13bb63511b
font_03_sfnt_off00016258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16258 19872 bytes
SHA-256: 74bd4282926fd2261e5b7e8143a2dfc0a48b5b90ea8c5c29b614acf505601304
font_04_sfnt_off0001832c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1832C 3268 bytes
SHA-256: 829a98395ef529bfbe748c8bb3cfaf4db20a66e8bc066b08786f0a2a2f862606