Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f74f0e3f8e20994…

MALICIOUS

PDF

76.7 KB Created: 2021-02-19 20:18:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1ebf45b9e6a9f05502b09de910d7d928 SHA-1: 22c7ff878c0b9bbef27d656e0f59f62d61001547 SHA-256: 5f74f0e3f8e209941d78a5734329e06d84b65898422fb47a76fd606f7fc64e39
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it is a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to downloading an 'apk', reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/wix?keyword=samsung+j7+root+apk PDF link annotation
    • http://rizaloripejo.iblogger.org/shell_rotella_t4_rebate_form.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405925/normal_6025d01591b29.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/OaTAjbQ/inside_the_black_box_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/jupujezaxa/if4ihoI/zugedogudexuropitilikunu.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/j1ggiiS/72459075748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454179/normal_5fd269947d9f2.pdfIn PDF document text
    • https://zofoneparadi.weebly.com/uploads/1/3/5/3/135341866/numawese.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/BhhWhiD/wuwuxogexitilepeb.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/jazezirimu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482216/normal_5fc93945143ce.pdfIn PDF document text
    • https://jukewamozaf.weebly.com/uploads/1/3/1/4/131438013/lifiwasex-zapuzozimu-fizero-dajesofasupobom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450042/normal_5fdfc53a39ac0.pdfIn PDF document text
    • https://fukidupedogof.weebly.com/uploads/1/3/2/8/132814182/tejijanoraxom_pepewutod_wudumibijozegup_rokofasemu.pdfIn PDF document text
    • http://loleveze.iblogger.org/91587911957.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kewugozosefo.epizy.com/tatalaksana_meningitis_tb.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/30125291006.pdfIn PDF document text
    • http://mowumaja.epizy.com/kilimanjaro_weather_report.pdfIn PDF document text
    • http://lazasubesuwup.epizy.com/29634117262.pdfIn PDF document text
    • http://riremeg.rf.gd/12152535546.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/autopsy_report_synonym.pdfIn PDF document text
    • http://xetezonosilu.epizy.com/anisotropic_deformation_theory.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A9 5148 bytes
SHA-256: 8c4eee7c09480265483339af8d3f6c8644eadf333f31c04e804068346d757511
font_01_sfnt_off0000f316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF316 10528 bytes
SHA-256: dea4a60b1a8bc7228e795de77ed6bd9be25c2d22b610e9a64294ba9432088349
font_02_sfnt_off0001170c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1170C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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