Malicious PDF — malware analysis report

Static analysis result for SHA-256 02797a2f6f3a3292…

MALICIOUS

PDF

72.0 KB Created: 2021-03-14 19:45:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7b360e792a11a4491c9f90cb22a6c741 SHA-1: b271891ae6086414813be2a65bc42479f335dbc0 SHA-256: 02797a2f6f3a32928d898368b681dc97fdbd7a930bd320bf73737be50b274ad6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous external URIs, including one pointing to 'nipisod.ru', suggesting it's designed to redirect users to potentially harmful websites. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, further obscuring its true intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://nipisod.ru/strik?utm_term=zebra+gk420d+test+page PDF link annotation
    • https://cdn.sqhk.co/moviferu/cja7wjf/84288846719.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479678/normal_6017b3b3ac1a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461746/normal_600ba9c42263d.pdfIn PDF document text
    • http://janurikemodowu.iblogger.org/format_sql_in_notepad.pdfIn PDF document text
    • https://cdn.sqhk.co/kijowevo/hbEiehc/beechcraft_bonanza_f33a_maintenance_manual.pdfIn PDF document text
    • http://jiwitoletazadag.iblogger.org/66509036180.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414515/normal_5fd886e311281.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_7a917efd791045fea27e1d1089758160.pdf?index=trueIn PDF document text
    • https://21dbc830-6d60-48ad-8ab0-00d2b3cb69e0.filesusr.com/ugd/18d949_13dfe03e4fec473a984ba015b0a29eb0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd6afae7-394b-4788-9e6f-08faee0d9688/what_is_the_role_of_animals_in_the_iroquois_creation_story.pdfIn PDF document text
    • http://jenilonadal.rf.gd/62509165406.pdfIn PDF document text
    • http://banebogol.epizy.com/topugizuladup.pdfIn PDF document text
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_0755e803a3a442a7bffd1968db7b1f6a.pdf?index=trueIn PDF document text
    • https://8a89c5bc-485b-4808-980c-66c60e8d9908.filesusr.com/ugd/834936_50b46d365d3c40f78fbbcc1a772952b9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc0f01e9-e5e6-4577-b722-f43c30ba46dd/petsafe_wireless_fence_replacement_collar_strap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56887971-fd95-4c20-a56b-bbd96d3babeb/jokimununele.pdfIn PDF document text
    • http://nasujaguza.epizy.com/gorenamekapixebolaxo.pdfIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_09616a86ad744524b729ea875925eaa4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b83a196c-b0bc-491c-9c5e-36cbae69b373/canon_imageclass_mf4450_windows_10_driver.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_off0000daa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA3 5616 bytes
SHA-256: db13d6d74cec51452e4fab5b43743f87943876ce39938b5130c32368360cff12
font_01_sfnt_off0000edd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD4 10940 bytes
SHA-256: 6eb94c055531179bf4959b4a16232392b0f7ba5ae5a0b9692f03173da086b5ef

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