Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5fd6b68019aba9a…

MALICIOUS

PDF

81.3 KB Created: 2021-04-11 22:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 58c8dc3a702f90da3b9900ec19aa7fb1 SHA-1: 9c2124e0e9c0f8c1d7113f7bd6be30a09eadc5e5 SHA-256: f5fd6b68019aba9af596cb55a33ebca283c88823f87343702ef2377bd521108d
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 0.9994

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://resalured.ru/strik?utm_term=what+did+charles+darwin+discover+on+the+galapagos+islands PDF link annotation
    • http://novijixonusasu.mywebcommunity.org/toxicity_of_vitamin_c.pdfIn PDF document text
    • http://xeniveperovabef.sportsontheweb.net/kuvekigapebesopaji.pdfIn PDF document text
    • https://cdn.sqhk.co/dodazija/hajdPid/road_trip_planner_uk_to_europe.pdfIn PDF document text
    • https://cdn.sqhk.co/zimajigon/Kia2LEF/femadere.pdfIn PDF document text
    • http://xuwivezotuw.22web.org/83760700745.pdfIn PDF document text
    • http://simamopi.22web.org/falexa.pdfIn PDF document text
    • http://zenododuro.iblogger.org/renaissance_periodization_diet_free.pdfIn PDF document text
    • http://silewugebed.scienceontheweb.net/xufudakidiguw.pdfIn PDF document text
    • http://fenofojerafama.22web.org/tibirix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_30e2fb3ce9a94da49f2b867a43b19d05.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/abnormal_ecg_report_means.pdfIn PDF document text
    • https://99b08629-27b2-41dd-83a1-938dc2ca35bd.filesusr.com/ugd/067ecb_bd83635f92f4472785a18bee3be1d518.pdf?index=trueIn PDF document text
    • https://24976a62-ea59-4ca6-8500-d0bd08f9a094.filesusr.com/ugd/65a075_668b3f7b75b74b13855f15bf4fb9cd5a.pdf?index=trueIn PDF document text
    • http://dalaxawavizaj.rf.gd/belajar_bahasa_arab_lengkap.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/activex_control_ie8.pdfIn PDF document text
    • https://ad323f3e-245e-4e3c-8b16-de91fefec063.filesusr.com/ugd/5ea691_0ed0ae9efc594af08bc40e65d0b7c97d.pdf?index=trueIn PDF document text
    • http://fugebuxojawuris.epizy.com/french_adjectives_to_describe_a_person.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/how_to_change_units_on_salter_scales.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/99430601826.pdfIn PDF document text
    • http://nuzuxomobepofe.rf.gd/vaxijewujazojuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/puxetujoka.pdfIn PDF document text
    • http://katuribadelu.rf.gd/jodojulaletatenu.pdfIn PDF document text
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_ebcbcf496cd349c8bce04e8bed9953f6.pdf?index=trueIn 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_off0000fc9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9A 5500 bytes
SHA-256: 80a198b8f336086c21b394dac445ef84ed9574c39626a5c6b1b32390ae0f1ddf
font_01_sfnt_off00010f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6D 11824 bytes
SHA-256: 24d0411de1f94e19f3a8cd088e2ad7f77456ee7a94a647cac15513569ceee7e7

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