Malicious PDF — malware analysis report

Static analysis result for SHA-256 e226daab0a59ba80…

MALICIOUS

PDF

91.3 KB Created: 2021-02-26 12:05:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4dd01cf85076b565e6f7f946285cc23d SHA-1: 50e3054623fd99671e93f337f0a28effe97ef45a SHA-256: e226daab0a59ba80d296cf72e1482ea044d6855f14e9515a7dc3898adc297fd4
126 Risk Score

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://leonvi.ru/123?utm_term=how+much+is+honda+rebel+500 PDF link annotation
    • http://wivejudotimog.22web.org/lutibujijuselikonurumi.pdfIn PDF document text
    • https://gofuzuxelizexo.weebly.com/uploads/1/3/5/3/135391542/8997741.pdfIn PDF document text
    • http://fisidunetozusi.iblogger.org/aristophanes_assemblywomen.pdfIn PDF document text
    • http://ganexofom.iblogger.org/9692801411.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/area_of_regular_polygons_worksheet_2_answer_key.pdfIn PDF document text
    • https://xetupowo.weebly.com/uploads/1/3/1/3/131382232/pisew.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/yiruma_river_flows_in_you_ukulele_chords.pdfIn PDF document text
    • https://cdn.sqhk.co/wuseguwe/giiji4V/gipifomezoguminubirefazuw.pdfIn PDF document text
    • https://vixikubinimagap.weebly.com/uploads/1/3/3/9/133997110/xawilupibotili_kiwukiwodizoxaz_tepaxefe_bolojavid.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/dufofu.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/dean_koontz_frankenstein_series_hardcover.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://belibivizonojo.myartsonline.com/56149324701.pdfIn PDF document text
    • http://mekavebij.epizy.com/yellowstone_national_park_lodging_guide.pdfIn PDF document text
    • http://kesufelitam.rf.gd/22287075455.pdfIn PDF document text
    • http://sejanaxopuvogiw.epizy.com/ben_10_omniverse_1_pc_game.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_off00012753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12753 5640 bytes
SHA-256: 4a82f3dd9b728116743c62b8f5c67db8dd70bfa1015380795e65e53c202f6bb7
font_01_sfnt_off00013a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A64 11264 bytes
SHA-256: 7da6568cdf1e2adbebbcc63861d73c7a142ade32929f25187eccd02fa859ac07

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