Malicious PDF — malware analysis report

Static analysis result for SHA-256 74343d42ae0c6f89…

MALICIOUS

PDF

73.5 KB Created: 2021-03-22 00:50:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a40643f963d59d399a89dabf6a27a773 SHA-1: 7d7948be47b3b2ec2c23136b24645571cfd3c1d2 SHA-256: 74343d42ae0c6f8999bd8cab40890891a9c27feb416095fa80ca479b3209f134
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are part of a link farm designed to improve search engine rankings. One prominent URL, 'https://xezojetit.ru/award?keyword=concierto+de+aranjuez+guitar+piano+pdf', suggests a phishing or redirection attempt disguised as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/award?keyword=concierto+de+aranjuez+guitar+piano+pdf
    • https://woteginawewe.weebly.com/uploads/1/3/1/3/131379999/xufira-parazidaga-xosodokopija-tapovu.pdf
    • https://loribipusav.weebly.com/uploads/1/3/1/3/131379532/c55308b3b.pdf
    • http://getedaxim.iblogger.org/xujijixo.pdf
    • http://sojekobab.22web.org/bavorolor.pdf
    • https://lozorodarefela.weebly.com/uploads/1/3/2/6/132681783/japotifalekaju.pdf
    • https://jamudavepavu.weebly.com/uploads/1/3/5/3/135324372/bab9973403.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/bizamesuwepe/daycare_worksheet_math.pdf
    • http://dezezefisimel.rf.gd/fizebabosakowuzetikinaz.pdf
    • https://s3.amazonaws.com/rupatojuko/wordscapes_games_answer.pdf
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_0dbac30962dd44308c1ddd475be3ade1.pdf?index=true
    • http://lejakoxepana.epizy.com/23226008105.pdf
    • https://s3.amazonaws.com/gotenukevepunin/samsung_galaxy_play_store_apk.pdf
    • https://s3.amazonaws.com/welanisowari/sagitukid.pdf
    • https://s3.amazonaws.com/minaxigevani/campagne_publicitaire.pdf
    • https://19d52a5f-8b21-4d9b-a6ae-3a87d75a5bf4.filesusr.com/ugd/9b7d8a_1c946dc2da2c41dab9ec29eae11877b0.pdf?index=true
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_df11571f24fc4d8eb865fa5533b37147.pdf?index=true
    • http://winovewivigo.rf.gd/stored_procedure_in_sql_server_2020_tutorial_for_beginners.pdf
    • http://kujujigufa.epizy.com/20504395173.pdf
    • http://dagogedimin.rf.gd/masada_caballo_de_troya_2.pdf
    • https://s3.amazonaws.com/forupokisip/can_you_put_any_e_liquid_in_a_vape.pdf
    • https://s3.amazonaws.com/mixanaz/remopuwex.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d24a.bin
eb10fbc1d3791a06caab978bafd6668df757cbfc834c03c4e486fd03274dae86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD24A 5144 bytes
font_01_sfnt_off0000e3e6.bin
27ef5528c6d8c2f496f6788fc21e5ba6c99c4021d8fcc955fc40d3d3b972a8bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E6 10624 bytes
font_02_sfnt_off00010831.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10831 4324 bytes

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