Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf6fafb66d6a8c7…

MALICIOUS

PDF

66.5 KB Created: 2021-03-29 01:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 19d360cb64d87ed73fb96648501eff93 SHA-1: c29eaab3c521150a054c5a1fc375fd3afb03433b SHA-256: 1cf6fafb66d6a8c723488bfadd4c71703a2b5f137f9dacd4b8954e3921327361
154 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a PDF link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and the presence of external links are indicative of a phishing or content-farming attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8028

Heuristics 4

  • 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
  • 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://xajibur.ru/award?keyword=cancioneros+para+guitarra+pdf+gratis PDF link annotation
    • https://zejewovelopitut.weebly.com/uploads/1/3/0/8/130813539/nesovujuvi_resivusil_vatemazusifew.pdfIn PDF document text
    • https://badosajag.weebly.com/uploads/1/3/1/4/131407507/f16a9401.pdfIn PDF document text
    • https://lajutiruwogow.weebly.com/uploads/1/3/4/5/134585316/5858319.pdfIn PDF document text
    • https://zefulesemed.weebly.com/uploads/1/3/6/0/136021217/vakisalovup.pdfIn PDF document text
    • https://gojaxuwawozupu.weebly.com/uploads/1/3/1/0/131070912/sopojipokupun.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/23d99a.pdfIn PDF document text
    • https://povemiloten.weebly.com/uploads/1/3/4/6/134608376/8867685.pdfIn PDF document text
    • http://gagafelame.22web.org/garmin_vivofit_jr_stretchy_bands.pdfIn PDF document text
    • http://reduslim-shop.site/the_solar_system_quizleteroxn.pdfIn PDF document text
    • https://tumipipap.weebly.com/uploads/1/3/4/5/134598024/602b7.pdfIn PDF document text
    • https://riligasiguvenu.weebly.com/uploads/1/3/5/3/135392009/raxovawiluvuwej_lawimosu_dejugire.pdfIn PDF document text
    • http://sallehub.xyz/fountas_and_pinnell_running_records_scoring_guidermc0d.pdfIn PDF document text
    • http://table-wait.com/57725461732w9xd1.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/tobovunoberiki/arjun_r_meda_video_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/how_to_pair_auvio_speaker.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/43281840729.pdfIn PDF document text
    • http://sobawen.rf.gd/73245030873.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/zipigigetapenusi.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/play_store_game_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/sokuxojizobowufep.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/personal_statement_for_college_template.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB97 5196 bytes
SHA-256: b668808059dcfbbd3214158412a46280f3d17fc650fd65c93bdafad7ad497223