Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc79a5ec3e90278e…

MALICIOUS

PDF

74.8 KB Created: 2021-03-30 21:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9a94c619df73975d19dede8c360dae56 SHA-1: 74f66a37e47160a0860cca720c15c246459bc6b6 SHA-256: cc79a5ec3e90278e2d105fa3f33a662b05dd4f5d389775121e1b95c9f0ea491e
186 Risk Score

Malware Insights

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

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 0.9997

Heuristics 6

  • 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.
  • 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://jacksth.ru/wix?keyword=degrees+and+radians+worksheet+pdf PDF link annotation
    • https://delidago.weebly.com/uploads/1/3/0/9/130969485/xujinobisexazurof.pdfIn PDF document text
    • https://mofagobebaz.weebly.com/uploads/1/3/4/6/134633285/fibisoboz-vapuxazuziwarad.pdfIn PDF document text
    • https://lulujazopo.weebly.com/uploads/1/3/4/7/134769354/vudagus-rufoxelid-puruwona.pdfIn PDF document text
    • http://latuha.com/xitojunozoledogixadizuvi2q8d8.pdfIn PDF document text
    • https://pulijapejupexeb.weebly.com/uploads/1/3/4/0/134041872/1100482.pdfIn PDF document text
    • http://napowojeba.medianewsonline.com/68188890753.pdfIn PDF document text
    • http://idealica-co.site/movies_horror_2020_imdbvdfte.pdfIn PDF document text
    • https://felonuwonab.weebly.com/uploads/1/3/0/8/130814100/7502557.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/pofawalinawumewuj.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/xasirifo.pdfIn PDF document text
    • https://nobuzuza.weebly.com/uploads/1/3/4/7/134757083/fowibibom.pdfIn PDF document text
    • https://zuseluxutiv.weebly.com/uploads/1/3/4/6/134686448/zeleguga.pdfIn PDF document text
    • https://tewabigonin.weebly.com/uploads/1/3/4/7/134760563/wefepunina-vowod-petivevogegi-depugomexixatu.pdfIn PDF document text
    • http://bu-markett.com/17153437502ncymb.pdfIn PDF document text
    • https://sijupazijeter.weebly.com/uploads/1/3/4/6/134639914/a9c655dff36.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/dutuzanob/16644860437.pdfIn PDF document text
    • http://tevefetilojas.atwebpages.com/samsung_idcs_28d_caller_id_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/65863934285.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/add_splash_screen_android_react_native.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/mona_lisa_overdrive_matrix_reloaded.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_off0000e531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE531 5428 bytes
SHA-256: 34b03961cd0da3779262d8b0d925ccec1beef066cb2e9d8c1cf636f036c447c5
font_01_sfnt_off0000f7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BF 11152 bytes
SHA-256: 88214f323a15b325f2c9d5e98900d5ee6027255aa0268eef99da4308bb97244d

Open this report in the interactive analyzer, or submit your own file for analysis.