Malicious PDF — malware analysis report

Static analysis result for SHA-256 d056408034bc074a…

MALICIOUS

PDF

115.6 KB Created: 2021-04-11 09:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e415bf72b8695b35a0de8b53381a2230 SHA-1: 2d38dbe4ccda62bdef055e2961a0d13f7a63df92 SHA-256: d056408034bc074ac6b556c778b8feadcc89e33c9dc461229af384c876937f88
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to suspicious domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to programming, likely to trick users into visiting the malicious links.

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://pelibifir.ru/strik?utm_term=how+to+round+numbers+to+the+nearest+hundredth+in+python PDF link annotation
    • http://tersq.space/vubepowizugau6qr1.pdfIn PDF document text
    • https://cdn.sqhk.co/lusimalifa/iigpjcx/freeciv_port_5555.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451035/normal_6065a5f726082.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/crazy_little_thing_called_love_song_writer.pdfIn PDF document text
    • http://fertpin.online/1528404854po1op.pdfIn PDF document text
    • https://cdn.sqhk.co/difakezil/2jeZjfD/ates_ve_su_1001.pdfIn PDF document text
    • http://kimugifogetami.medianewsonline.com/rezosinabujutixeket.pdfIn PDF document text
    • http://pizovanijeb.22web.org/how_many_questions_are_on_the_cdl_general_knowledge_test_in_texas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415518/normal_601aff8136c0f.pdfIn PDF document text
    • https://cdn.sqhk.co/vovidonob/qvHEig9/83130937732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452217/normal_6052fe6285088.pdfIn PDF document text
    • http://xupokaxe.medianewsonline.com/wadugokole.pdfIn PDF document text
    • http://arenaprobet.com/labubusajelewz0fq.pdfIn PDF document text
    • http://meblik.su/atwood_furnace_manualae63d.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://bukinajomo.epizy.com/havoc_demon_hunter_arena_guide.pdfIn PDF document text
    • http://nawexox.epizy.com/gixekizirisamoxe.pdfIn PDF document text
    • http://xabogubumux.rf.gd/wufoxuwubujotabile.pdfIn PDF document text
    • http://pilumefagani.rf.gd/baragenopibinubopininox.pdfIn PDF document text
    • http://rowagaparik.rf.gd/lorijexonu.pdfIn PDF document text
    • http://zogonigabi.rf.gd/gb_whatsapp_new_version_2019_april.pdfIn PDF document text
    • http://xorewabamav.epizy.com/98553575813.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_off00017639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17639 5344 bytes
SHA-256: 647f43396f51b773dab5e58d6a7c17351a36f7f066b2638aafdcd2af12893193
font_01_sfnt_off0001883c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1883C 12320 bytes
SHA-256: bb22a1fbee31e8fe2f11d99416ad27a2c251d10d234ce8c89ac3764474049828
font_02_sfnt_off0001b22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B22B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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