Malicious PDF — malware analysis report

Static analysis result for SHA-256 933f6a31c63ad011…

MALICIOUS

PDF

77.4 KB Created: 2021-04-18 18:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 60973541b265e8ebb977055a0adb51b3 SHA-1: 5866bea73e2ccf5caf7ff253b11b16a86c650ab3 SHA-256: 933f6a31c63ad0115d3b7d79ff2516c05f88fb2aee04bdcc2afb51d56034ed03
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 0.9996

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://gimoguvi.ru/strik?utm_term=how+to+play+super+mario+bros+2+on+switch PDF link annotation
    • http://fiwisud.getenjoyment.net/99631220127.pdfIn PDF document text
    • https://dovidememalow.weebly.com/uploads/1/3/4/6/134601329/1477464.pdfIn PDF document text
    • https://zatozidebowetam.weebly.com/uploads/1/3/1/3/131398213/0112c.pdfIn PDF document text
    • http://mevobul.22web.org/wijujuliwibizumidoxu.pdfIn PDF document text
    • http://resimpub.com/aguilar_tone_hammer_manual_espaols594c.pdfIn PDF document text
    • http://securityverifiedservices.com/descargar_libro_de_yunus_cengel_termodinamicag8tog.pdfIn PDF document text
    • http://braco.ru/zigefotux6x1re.pdfIn PDF document text
    • https://tikefukexizuse.weebly.com/uploads/1/3/4/8/134879623/4481240.pdfIn PDF document text
    • https://resafuki.weebly.com/uploads/1/3/1/3/131398359/mazubige.pdfIn PDF document text
    • http://gizigevom.mygamesonline.org/definition_of_assertion.pdfIn PDF document text
    • http://nakijeku.mygamesonline.org/10009916450.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/japafeloxewonubotaxa.pdfIn PDF document text
    • http://milansit.space/fisimi8a0r8.pdfIn PDF document text
    • http://igonlinesupport.com/zulegavudesomejoxonikflgka.pdfIn PDF document text
    • https://rilavowa.weebly.com/uploads/1/3/2/7/132740415/8991994.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://forofadikov.rf.gd/annie_character_list.pdfIn PDF document text
    • http://tuguwobafadurot.rf.gd/3474535933.pdfIn PDF document text
    • http://minofadejewezup.rf.gd/autocad_book_download.pdfIn PDF document text
    • http://nevafofuvabovid.atwebpages.com/63139191001.pdfIn PDF document text
    • https://2dcb0092-dd22-4cef-90c1-8c398f802bb7.filesusr.com/ugd/ff3115_a152e63e3c9d45ac856ea4135de4dd3e.pdf?index=trueIn PDF document text
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_b48757a1a6ab4aaeb659eadc419494e0.pdf?index=trueIn PDF document text
    • http://rizusuzapil.rf.gd/baghbandi_khela_video_song.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AB 5600 bytes
SHA-256: dc9b22047f6e2da0ac85f6727407d21a5621930081e1f48bff695522f2c52ea8
font_01_sfnt_off000103a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A0 10768 bytes
SHA-256: 3867a906ab013f68de3cf2ac4307e6359492bbf8fd4b93b3c444016f55b2e82f

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