Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6a6dea3ab35277…

MALICIOUS

PDF

81.8 KB Created: 2021-03-23 13:10:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 625333464e227a478a3a3d01c808777b SHA-1: a1c494321e4f745557cdd68ecc3bbbe8cac74a0b SHA-256: 6e6a6dea3ab352775bf7e7c873d98a6e590e6b66734bc6a06f628001d63b0ba1
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to link farms and potentially malicious domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and external links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://mezovuduw.ru/award?keyword=cv+format+for+job+pdf+file PDF link annotation
    • https://luroxonigin.weebly.com/uploads/1/3/1/4/131406321/4889983.pdfIn PDF document text
    • http://vashastrahovka24.ru/scarlett_18i8_1st_gen_vs_2nd_genu0poe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382974/normal_600a3fed32d57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384320/normal_60512a5d335e3.pdfIn PDF document text
    • https://nozitobolilijaz.weebly.com/uploads/1/3/4/4/134473425/4112716682ca60e.pdfIn PDF document text
    • http://sodahq.pro/jifubozogunojr157.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421788/normal_5fd6005e1f044.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465015/normal_5fffa416f014b.pdfIn PDF document text
    • http://topstop.site/what_does_gdp_per_capita_say_about_a_countryvf884.pdfIn PDF document text
    • https://gakulenem.weebly.com/uploads/1/3/1/4/131437742/vepupiparamumitix.pdfIn PDF document text
    • https://zumaraje.weebly.com/uploads/1/3/0/7/130776401/solugebefodafo-tuxumoxakog.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/luramamelolem/in_paradisum_gregorian_chant_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/catharanthus_roseus_chemical_constituents.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/basara_3_pc.pdfIn PDF document text
    • https://ff743420-c5e2-4527-a456-70ddb2a1abd8.filesusr.com/ugd/5178f2_df2d32c9bf6d4dc5b85214c459cdded0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dalava/85605342793.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/40046426647.pdfIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_4a180a89817f428fab5d121a5bd6bf04.pdf?index=trueIn PDF document text
    • https://676a7a22-5bec-432e-92e0-9d4a0a27851c.filesusr.com/ugd/a1fb72_2780b79094ef411d8ba23bc5c85075ce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/does_costco_sell_vitamix_blenders.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/epson_wf_2540_printer_paper_jam_error.pdfIn PDF document text
    • https://6d0c6d30-55b9-4b7f-8145-34d11b484ddf.filesusr.com/ugd/8db56d_8713f38f4fc04b53992243abceeb75b1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/edakkad_battalion_06_songs_kuttyweb.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/66878568396.pdfIn PDF document text
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_8a235bec980f41099dec1b4ced43a905.pdf?index=trueIn 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_off00010086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10086 5188 bytes
SHA-256: 8dd425582566898ed83968ab80860a7bbf7b0cd7bf3bf4ff42d0c1cb54c54876
font_01_sfnt_off00011215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11215 11168 bytes
SHA-256: 589aeaec8c05956f80310582345eb50113936a6d3dc74d8824761df92e4cb278

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