Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc0a79904e23468f…

MALICIOUS

PDF

82.2 KB Created: 2021-04-07 23:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2b30cab6d2b51e94129ff34b821c801d SHA-1: a9bb7a6418d815229e895f2b64016bfd970e0335 SHA-256: bc0a79904e23468f67b068bec781b1c8df78ba4db4132918aa44126fcefc276f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further malware or conducting phishing campaigns. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=friends+being+there+quotes PDF link annotation
    • http://bizowokare.getenjoyment.net/bemba_proverbs_and_meaning.pdfIn PDF document text
    • http://kavelokafozi.medianewsonline.com/ncert_english_textbook_class_11.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/what_page_does_atticus_sit_outside_the_jail.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/gewyge5/zelibijozij.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/how_to_uninstall_hulu_on_lg_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/gixelotopa/uShjhcc/spanish_infinitive_reflexive_form.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/23497096473.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/cjfV7Ti/crossword_solver_game_of_skill.pdfIn PDF document text
    • http://nutosuvitiraj.scienceontheweb.net/57982864851.pdfIn PDF document text
    • https://cdn.sqhk.co/tedefoso/8ANfBgd/knife_hit_2_crazy_games.pdfIn PDF document text
    • https://cdn.sqhk.co/nutewakizi/2hiDghm/11342612863.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://jitelujojutomu.rf.gd/aplikasi_video_maker_android_tanpa_watermark.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4115e0e1-a8c9-49c0-96e6-98ab6ad8b70f/keurig_k45_elite.pdfIn PDF document text
    • http://fivamoxopel.epizy.com/nigubavuwosaruwapinubetid.pdfIn PDF document text
    • https://dd39d194-9042-494f-90ab-223c96cf8da5.filesusr.com/ugd/5d3909_6218b908a8034b5587e346fdf69cefaf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/233e119c-e2df-422f-bd5e-4291c1de70fc/21669991822.pdfIn PDF document text
    • http://zozupajekuledus.myartsonline.com/fokozek.pdfIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_1f7166b80d2040c18f347efc842dc7c9.pdf?index=trueIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_f7d8e5f2a9e44765aa1c428740f400ba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/df9cdae6-a1f2-461e-b1a9-63a46caf73d4/38262078145.pdfIn PDF document text
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_216a7fdbd91a4657979786e9f7584276.pdf?index=trueIn PDF document text
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_cc58e6d3189d43eba1c02534238f2a56.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c6dae04-7a9e-4bf6-b3e2-dcefd18d01cd/pofojujapasuzodiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eefc570f-6098-434d-a6e2-9ae32691ed65/96555577958.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_off0000f5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EB 4948 bytes
SHA-256: 79be111e1b639f90fd85df4cfa5959358e691fd086175da71343b3a5a7beed65
font_01_sfnt_off000106a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A4 11424 bytes
SHA-256: c0b77dd4fa93a98eb8625339f8a33f0bcf098a7bfe98d84417b9f10c25afbe8e
font_02_sfnt_off00012d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3