Malicious PDF — malware analysis report

Static analysis result for SHA-256 068ea41dbfaa7c58…

MALICIOUS

PDF

69.8 KB Created: 2021-03-18 09:27:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ae0f374673ebf24a8134ef7172fb7ca0 SHA-1: 9fb773d62a9ee240f5951769dcca06a0f7be37bb SHA-256: 068ea41dbfaa7c5826b9d3278ec3dd5a6cfbd8e433286932281916cf0ca26309
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. It contains numerous external links, including one to 'xajibur.ru', suggesting an attempt to redirect users to potentially harmful content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate a strategy to distribute a large number of links, likely for SEO manipulation or to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/wix?keyword=wade+hampton+lanes+coupons PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4493589/normal_5feea5c38f8b5.pdfIn PDF document text
    • http://marketitaly.info/chakra_guided_meditation_15_minutesmgk0h.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/eede95a70bbedc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374696/normal_6003b33fa1118.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425209/normal_602752eadee1f.pdfIn PDF document text
    • https://gogijufiwadika.weebly.com/uploads/1/3/4/5/134581681/fazuxunoligike-wumiberemugilu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369782/normal_5fdedacdc5b01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458622/normal_6011ce4c2a44d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381297/normal_60503b4670037.pdfIn PDF document text
    • https://dorigobumin.weebly.com/uploads/1/3/1/3/131384291/f880a573f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414873/normal_5fede5a07134b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481271/normal_5fdef7a84859d.pdfIn PDF document text
    • http://zoneeuro.pro/planeacin_estratgica_personal3gygf.pdfIn PDF document text
    • http://merishwheelrecords.com/lutamipakuronagizuwigogbp5l.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/nerugiraxura/appdater_full_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/bela_bela_song_djpunjab.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/chemical_engineering_website_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/calendar_september_2018_word_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/the_game_1997_movie_hindi_dubbed_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/momovapuxosagusiwulikaf.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_off0000d39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39F 5232 bytes
SHA-256: 3d571b7ec1439221e37466de90e7e26c6f26bf5fac625d54cf7c180358f09cf6
font_01_sfnt_off0000e552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE552 10760 bytes
SHA-256: a623663b6c44958002e01316637bf52bf1f03a696073598caf9a517979d64d23

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