Malicious PDF — malware analysis report

Static analysis result for SHA-256 97bfe179a068f745…

MALICIOUS

PDF

90.5 KB Created: 2021-09-10 13:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 02b7d6e94c2943fc7c854c8cc95ce121 SHA-1: 4ea8edc61f98576866b9003429917737411a7f8f SHA-256: 97bfe179a068f745dee89e5c83edabeea8422817b18b0f5901b7000a7f510582
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The numerous external URIs, many pointing to compromised or disposable hosting, suggest a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the execution of JavaScript to redirect the user or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://france-ex.com/images/blog/file/45000989189.pdf In PDF document text
    • http://daiichibus.vn/uploads/news_file/fabed.pdfIn PDF document text
    • https://mondoaudio.it/img/uploaded/file/79376665586.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/93468790438.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16138edc900f24---munuteforativukari.pdfIn PDF document text
    • https://autohausnschmidt.de/userfiles/file/738076628.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/612f2a1f41b8d.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/36879339484.pdfIn PDF document text
    • https://korvioinfotech.com/ckfinder/userfiles/files/50032622224.pdfIn PDF document text
    • http://rujiahk.com/uploadfiles/file/7511228305.pdfIn PDF document text
    • https://electroagro.es/pub/files/68207256455.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/9cmuh2nsehovcpv7ia7rdetp8j/dotuxetutolisuzitepefo.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139679a5815b---24578412511.pdfIn PDF document text
    • http://saconsultancy.com/userfiles/file/wunatat.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/72531555751.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/28405187661.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/suvakenularevekotofudido.pdfIn PDF document text
    • https://kimansion.com/uploads/file/falosabetomosetinurazi.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/487c2f6358fc74fac7857a5cdb425242/46637134927.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/48110366839.pdfIn PDF document text
    • http://betonkeritesek.eu/Content/files/kibatozitudiraxepe.pdfIn PDF document text
    • http://turningpointdigital.com/cote_dor_import/admin/ckfinder/userfiles/files/xafefativazotarewogufulup.pdfIn PDF document text
    • http://nordicwalkingturak.hu/_user/file/sasipugetepu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=como+resetear+un+samsung+galaxy+mini+2PDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000113fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FD 19088 bytes
SHA-256: a54dcbd246d3822ee10f5dc2f927156e9c1074b1240ba05d6ba359671cdc6315
font_02_sfnt_off00014422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14422 10920 bytes
SHA-256: 4a1a22962f9a7c8ea778757898021893747cf47683b5bc039d6d9fb684f7e4d7

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