Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f5dbe254a6831ab…

MALICIOUS

PDF

81.8 KB Created: 2021-04-17 05:40:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 20bfed0314df5029764bb9df430e1c7e SHA-1: 6db796b399fd56e71cbdadf8f0847ddecc1a7126 SHA-256: 4f5dbe254a6831ab9fa42fb8f082e58cd4c9b05f5aa483525d21e3fc8486150a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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://crophysi.ru/strik?utm_term=is+there+a+samsung+universal+remote PDF link annotation
    • http://gexomafe.mypressonline.com/vewifoz.pdfIn PDF document text
    • http://masalev.ru/panasonic_kx-tg7875s_user_manualqf85j.pdfIn PDF document text
    • http://50offit.pro/751570881027z6vt.pdfIn PDF document text
    • http://scoretdho.best/tomb_of_annihilation_companion_free5pysp.pdfIn PDF document text
    • https://dozefiduvema.weebly.com/uploads/1/3/4/6/134617149/2022040.pdfIn PDF document text
    • http://suzamakulamuj.mypressonline.com/fewowikom.pdfIn PDF document text
    • https://removevas.weebly.com/uploads/1/3/4/4/134443453/wilike_paxivuresov_sizajevir_dagufoju.pdfIn PDF document text
    • https://tulofezufiruz.weebly.com/uploads/1/3/1/4/131409090/kasogixupa-sikutodivum-fukoniweton-vuredezigigavug.pdfIn PDF document text
    • http://usersonlineguardingsettings.site/2779538495ff977.pdfIn PDF document text
    • http://sentytld.online/52406352844yydqx.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/jirebonudur/5th_edition_dd.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/bhimavaram_bullodu_songs_naa.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/89731464924.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/a5_format_size_in_cm.pdfIn PDF document text
    • http://nibemodida.myartsonline.com/54751484515.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/linux_kernel_documentation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/diwarom.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/6382390690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78325730-5aa6-44f5-84c9-f908a8dd9e17/tecnicas_e_instrumentos_de_recoleccion_de_datos_segun_sampieri.pdfIn PDF document text
    • http://xedavabawavela.onlinewebshop.net/lobugodiruxutefubebosat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dbd89cb-516d-4d2d-979b-d3cbaf85cb66/how_do_i_buy_options_on_thinkorswim.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/79148105663.pdfIn PDF document text
    • http://bidusibebawuz.onlinewebshop.net/45314546039.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/guided_path_foundation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beb71209-811f-41cb-aafc-24b9ccb99ccc/91811983116.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_off0000ff96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF96 5096 bytes
SHA-256: a6f232c943a634cbe78eff218a412de5d74d5d8ba8507d4c776b591340605373
font_01_sfnt_off000110c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C9 11444 bytes
SHA-256: 2d78a4640c975415fa127b9e2e987a9636fdd6a5c03131d2c7cdcd4795c038a3

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