Malicious PDF — malware analysis report

Static analysis result for SHA-256 8915e6acd2c6dd91…

MALICIOUS

PDF

83.1 KB Created: 2021-04-27 14:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4c45e71570bf39e14198c081c6125364 SHA-1: 6eee1745121144ef7dc86ab98cf17b2afe388b01 SHA-256: 8915e6acd2c6dd918fe4c6e421b957c1fdac46b737917be54f79abfeda62fd8a
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'Attack on Titan 2' and 'gameplay', likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://botokaw.ru/strik?utm_term=attack+on+titan+2+final+battle+xbox+one+gameplay PDF link annotation
    • http://repefokuxogefu.22web.org/apk_caustic_3_pro_gratis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417406/normal_5fd2fac1354f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495399/normal_606313fa8e198.pdfIn PDF document text
    • https://cdn.sqhk.co/varomapit/rjilABQ/wedakevezuzupotejebovepu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391605/normal_603594f3e557d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474989/normal_605a5354929d3.pdfIn PDF document text
    • https://cdn.sqhk.co/widexerun/fifgi5l/wuxetiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485448/normal_5ffd1fa69c054.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486748/normal_5ff13ec4c6078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_60129545886fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500183/normal_603d2f10c0b4b.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/jiiieo4/unlimited_drive_storage_github.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484818/normal_5fe0614173c1d.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
    • https://s3.amazonaws.com/fupanabivote/78128229676.pdfIn PDF document text
    • http://xogowakowokavuw.rf.gd/lefovepupujanaso.pdfIn PDF document text
    • http://gomekojesigir.rf.gd/49246546624.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/desirexexe.pdfIn PDF document text
    • http://wapowidomuf.epizy.com/alimentos_transgenicos_definicion.pdfIn PDF document text
    • http://gorevifero.epizy.com/33817933174.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/how_do_i_reset_my_jlab_earbuds.pdfIn PDF document text
    • http://rusogiwelak.rf.gd/cephalosporin_generations.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/44842099741.pdfIn PDF document text
    • http://jofanebef.rf.gd/bleeding_time.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FD 4120 bytes
SHA-256: 03eeafd9f3f3cb3c1d547ed97ffb4a36788d803c3cee82d2c5954144e6774ea9
font_01_sfnt_off0000f69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69F 5344 bytes
SHA-256: f45a41c15ad89d517d72d71543fd591c2285446aa1aa696bb2c5c6a8bd04f8d5
font_02_sfnt_off000108cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CD 11588 bytes
SHA-256: 8a8e6ffb3ea160439e776f8fdb94c6d997e8adc666946454a6bf0612a4e34c14
font_03_sfnt_off00013059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13059 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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