Malicious PDF — malware analysis report

Static analysis result for SHA-256 e280fbe0d5489c73…

MALICIOUS

PDF

84.0 KB Created: 2021-04-26 13:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ab6d975857f9b00a9eeb23f6aa57fbce SHA-1: 06f62b08ed3ea6d2cc66f7431b2c22ab88bd4690 SHA-256: e280fbe0d5489c73fd50cd14dc496a4299092aec6f079d33d590e9fedfc1f968
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with a critical heuristic firing for a PDF link farm. This suggests a malicious intent to redirect users to potentially harmful websites. While no scripts were extracted, the PDF structure and numerous external URIs strongly indicate a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://seumenha.ru/strik?utm_term=why+did+esmeralda+choose+phoebus PDF link annotation
    • http://wodekenizowa.getenjoyment.net/soft_heat_soothing_therapy_heating_pad_reviews.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/64408570737.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/11933215676.pdfIn PDF document text
    • https://bitusuverutito.weebly.com/uploads/1/3/1/8/131871453/5476144.pdfIn PDF document text
    • https://pebepatesova.weebly.com/uploads/1/3/4/4/134447190/9d3c0720cf8bf7c.pdfIn PDF document text
    • https://motisodufar.weebly.com/uploads/1/3/5/4/135400919/fb090f8.pdfIn PDF document text
    • http://lubevos.scienceontheweb.net/85460876419.pdfIn PDF document text
    • https://kadilawozozupaj.weebly.com/uploads/1/3/0/7/130739633/ee763a49d5b08.pdfIn PDF document text
    • https://rasozonikazip.weebly.com/uploads/1/3/4/9/134904665/wabomiku-bosesabiput-wokafo.pdfIn PDF document text
    • http://bowuvudofi.scienceontheweb.net/autotransformer_motor_starter.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/what_does_the_idiom_a_baptism_of_fire_mean.pdfIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_e468075404e141eca9d00fc618f998a5.pdf?index=trueIn PDF document text
    • http://nisetekotixob.myartsonline.com/56101040734.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/cidco_online_form_login.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/jolarizite.pdfIn PDF document text
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_36cb338818cb49d4ae150db329ca6427.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tezude/muzenibiwijameposunila.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/18947504779.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/why_does_my_dvd_player_not_read_the_disc.pdfIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_0df6bdaa446b4e4985ce3dffac93a58a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/subject_verb_object_worksheets_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/40792240936.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DF 5568 bytes
SHA-256: 6686a04e79dc238d11b6d0744217a1721a849bd9236832990d1c3caa829527b1
font_01_sfnt_off00011aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAD 11244 bytes
SHA-256: 66911044e674dcbc28322c9de98ad5c14a6553316e9f7fbd8f1c2c0d93bccdcb

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