Malicious PDF — malware analysis report

Static analysis result for SHA-256 22954a41a1e3b976…

MALICIOUS

PDF

82.6 KB Created: 2021-09-16 14:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 60c759931904b77e5a5a959622b887b3 SHA-1: e843904868fb4cff197dd334bfe389700e188676 SHA-256: 22954a41a1e3b9768ae4c24a6822e70ca0962fe08efcbf4b84b76a5fda9d555e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous URLs that form a link farm, likely intended to redirect users to malicious sites. The PDF structure and embedded links suggest an attempt to exploit user trust by presenting a seemingly legitimate document that leads to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://garglob.ru/uplcv?utm_term=antropometria+y+ergonomia+pdf PDF link annotation
    • http://studiosiriosrl.it/userfiles/files/62402236667.pdfIn PDF document text
    • http://ctcinsulator.com/uploads/file/rifigevuwimojenanafalojiv.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614138a185624---napanoxedagonogu.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/linodesudinirezira.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/jevedumoxozu.pdfIn PDF document text
    • http://mcutech.net/upload/2021/09/file/16311578341364312997.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/xugarikenivo.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/4ac0c78662b123d854b3e6a554eac59f/rubapifiluw.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1631613045.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50866622798.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/83094551388.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/31754244090.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/vuvuwalalenosemamed.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/bakimulimaj.pdfIn PDF document text
    • http://saveondealz.com/ckeditor/ckfinder/core/connector/php/uploads/files/84116529928.pdfIn PDF document text
    • http://compagniaviaggi.gattinonimondodivacanze.it/themes/userfiles/files/57706582867.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/kesivusasoxulifuk.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/zozifepedemol.pdfIn PDF document text
    • https://fcr-fomentoconsumoerenda.com/uploads/files/64983890625.pdfIn PDF document text
    • http://cavusofis.com/images_upload/files/51898316658.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613e39c72ef3c---tifuxejuxarazixa.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613db6d2a92cf---fuvefixabilob.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/velazidunopebuxekowaji.pdfIn PDF document text
    • http://jingyitech.com/uploadfile/gadado.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9d7c762eb---lapavoxupubuxonawozo.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://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_off0000e063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE063 17096 bytes
SHA-256: 181562287baab6c3e96247572b4fe5a74c809843d6e1aca21b0c67bdf2973d26
font_01_sfnt_off00010be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F7 10724 bytes
SHA-256: 0717a4646266e928ef0bc73339ef710a7195e31e17fe917128dbbb76cf505031

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