Malicious PDF — malware analysis report

Static analysis result for SHA-256 2628d72a0e24246e…

MALICIOUS

PDF

74.8 KB Created: 2021-03-01 02:45:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2709656ac04635b0a4c6e8837c791ce8 SHA-1: d3972f32a3b736c749520eb6882846b2b7779e27 SHA-256: 2628d72a0e24246e4f66f7771ae6e24a5acb0151b39c4c0f3f9b6ec8f6930ffb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of numerous external URLs points towards the distribution of malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=the+stand+movie+cast+moon PDF link annotation
    • http://lnstagramverifiedbadge-form.com/bise_sahiwal_gazette_2020amjfb.pdfIn PDF document text
    • https://zutomivopisi.weebly.com/uploads/1/3/6/0/136051870/e4c4a0da6e9ad7.pdfIn PDF document text
    • http://datinge.site/fate_core_system_character_sheetx8957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393188/normal_6009c29d527c2.pdfIn PDF document text
    • https://voxomusixexuso.weebly.com/uploads/1/3/4/8/134851372/49b8fe89e3.pdfIn PDF document text
    • http://stalekost.site/creature_3d_movie_songs_bestwapkeui9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388285/normal_5ff176ed58189.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwuxa/ifA9iaS/90s_skater_jeans_primark.pdfIn PDF document text
    • https://cdn.sqhk.co/lajoroteb/jj6rjff/pobibuvowomevu.pdfIn PDF document text
    • https://cdn.sqhk.co/denalivek/xjdhaha/youtube_video_upload_jio_phone_2020_tamil.pdfIn PDF document text
    • http://kfcrabota.ru/59566548258dhmfo.pdfIn PDF document text
    • https://fuzurisef.weebly.com/uploads/1/3/4/3/134369427/megarir-pizitufube-wexurobekaz.pdfIn PDF document text
    • https://cdn.sqhk.co/gepabafi/BhhigPR/81017128837.pdfIn PDF document text
    • https://gukilebulasule.weebly.com/uploads/1/3/2/6/132682884/2750169.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/minegikukovel/bts_photos_zip.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/joresagatamivazu.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/mauryan_empire_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/95198059359.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/apache_spark_java_programming_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/40789651467.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_off0000e948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE948 5060 bytes
SHA-256: 75ce1c717311645479ca0c2ded95975aba7103a5b813be85961952c0bfd89718
font_01_sfnt_off0000fa60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA60 10556 bytes
SHA-256: c1d6d9a7fac503894130200fcc0209633f3ed8283fc4578f0fd64da891d018dd

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