Malicious PDF — malware analysis report

Static analysis result for SHA-256 26872caa49691424…

MALICIOUS

PDF

74.5 KB Created: 2021-03-03 06:04:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c0ab467b3a9126ac21b9eeb02151fa6d SHA-1: 27f56b5e1349375fc517ad988127c49010541492 SHA-256: 26872caa49691424e52fb03cd0143f8926f15e1fc7d3df260fe74737a1fe0d60
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a high heuristic score indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious content.

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://soxebez.ru/wix?keyword=oskaloosa+high+school+staff PDF link annotation
    • http://fewomazojuxed.iblogger.org/xagepizabalus.pdfIn PDF document text
    • http://peuly.xyz/vanorowapalolak7p94q.pdfIn PDF document text
    • http://b4shop.icu/pakiwiperipezojakufiwanuakv7k.pdfIn PDF document text
    • http://atlas-copco.su/gulogazadolovorebijulfibbt.pdfIn PDF document text
    • http://ejinaya.com/patufinjch9.pdfIn PDF document text
    • http://bahis-sikayet.com/2069091372pb3wg.pdfIn PDF document text
    • http://testrun.ru/67521420639fedwy.pdfIn PDF document text
    • http://yourlivehelp.com/geophysical_research_letters_templatef8mx3.pdfIn PDF document text
    • http://kernig.pro/flower_mound_isd_careers6tctb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nolixegoxow.epizy.com/97278443920.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/fezerer.pdfIn PDF document text
    • http://soxuxemakim.rf.gd/how_to_write_joining_report_for_teacher.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/living_on_a_prayer_trumpet_sheet_music.pdfIn PDF document text
    • http://kufalogomisag.epizy.com/blue_coat_sixth_form_entry_requirements.pdfIn PDF document text
    • http://kukatunudivolu.epizy.com/google_drive_limit_reached.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_off0000e858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE858 5140 bytes
SHA-256: 1404ec8e8a798d15b00b3476e352e46f4f81244d23cc32030c45c59399dec9e6
font_01_sfnt_off0000f9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DE 10388 bytes
SHA-256: 1335ad5a45452a8589b760a62fc0b364dafcb98ec6d0c14f2af61e0a049957d2

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