Malicious PDF — malware analysis report

Static analysis result for SHA-256 124e6632827228c7…

MALICIOUS

PDF

78.2 KB Created: 2021-09-04 17:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f43614216e5d53bc6872b42fa95f5ebe SHA-1: 3e60cd20e20e62cc4eca1a6dc9b811e87ab9f87e SHA-256: 124e6632827228c7c689c644df9079cb4d49ba2cdaf409b11cc53a3fe425d3cc
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malicious content delivery mechanism. The document contains a large number of external links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to distribute traffic or host malicious files. No scripts were extracted, but the presence of numerous URLs and the overall structure strongly suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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://e-district.org/userfiles/file/xupiwanipagugozoxa.pdf In PDF document text
    • http://teleinwestor.com/userfiles/file/datisonozuzovowora.pdfIn PDF document text
    • https://actorconseil.com/files/file/27768260782.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/82095189013.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/074a1d82104e10148a47617551f3e987/lufodiwemutibejojibu.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/88654728321.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160772082c7e6b---lenosopinupuzofelek.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/nagobosugin.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/fe0f8c3ff01801ed3429ab3a7427fc5b/fewolururirogoko.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/84094574938.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/8237941397.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612483ce31cdb---rojupogexebo.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/lebukajogapa.pdfIn PDF document text
    • https://legyenegyjonapod.hu/userfiles/files/67787602694.pdfIn PDF document text
    • http://grossfamilyreunion.com/clients/0/00/00c8ca1d7e0432e0ca4c178cf0a97985/File/winalow.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a01390dc8c---bosigasojafimomadanud.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd05ad60c1---52584884245.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/jipojew.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160cbef97cc02e---88858879553.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3230b884b---69100581683.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/634e76f1aba6d8f027b4409739691055/12379549028.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/kdkvare76lo15qaso4aepe7tr1/3910999145.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/cfe6748a954ab562aab4290de0fb874a/zonokibodifite.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609c724f9353a---nazeko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=panasonic+cassette+air+conditioner+installation+manualPDF 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_off0000cfc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DA 10632 bytes
SHA-256: 65b2f66ecae6e842c6793228e641b199610bb37dd90d0e3736a63ce10be9fb11
font_02_sfnt_off0001002d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002D 16684 bytes
SHA-256: 395380b3f8cfb6aabbcacc3c0e384f62ab042e5b21c698f00ad1c5443a0292a3

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