Malicious PDF — malware analysis report

Static analysis result for SHA-256 047eb170a02a57ec…

MALICIOUS

PDF

122.9 KB Created: 2021-09-01 10:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6162b6a90f8f2a01216b9cad898e4717 SHA-1: a3cd4b73236c798f5478ee41785449d6d855c0cb SHA-256: 047eb170a02a57ec06e8537062810169520c229adda7b22945423a0d9d8b35cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://infrive.ru/uplcv?utm_term=characteristics+of+shannon+and+weaver+model+of+communication PDF link annotation
    • http://poongdung.com/FileData/ckfinder/files/20210803_D62863B5C0F765FC.pdfIn PDF document text
    • https://mlbcsimleague.com/ckfinder/userfiles/files/sepakesomor.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/bejawigo.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16119ef32946c5---3155764636.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/32490209139.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/20805682713.pdfIn PDF document text
    • https://latework.cz/soubory/lopupowuja.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6a26d069736a025a55ca1c3de198d1d3/74159988985.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/f94bef115cac7f4a54282e8ce1f7ca0e/fomuwojiragujiw.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/e2c23e42b92b9d49b8231df2add213bf/lijixomurupipijutu.pdfIn PDF document text
    • https://rainbowprinter.com/app/webroot/files/file/guxomapeduxegaditir.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c6c27449a---11174857578.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/49075602096.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/83972990018.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/m7knq6vn0ig08sdbn7bavffp24/46296847290.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/86715154702.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/f3a2f8a2e259930c77ce7390f523e78f/87165898648.pdfIn PDF document text
    • http://gediklimakinahidrolik.com/resimler/files/18567727653.pdfIn PDF document text
    • http://acutecardio.ru/sadm_files/zaweruvedopalusa.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/a34921a32adb244fa672d89eac3219b2/52306546517.pdfIn PDF document text
    • http://yves-segers.be/userfiles/files/26220834502.pdfIn PDF document text
    • https://dichvuketoanvn.org/uploads/files/dagizafarutetulep.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/pudugajuxifi.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/c279574fdf17a1a73d371c645108be54/21817113441.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_off00017618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17618 11024 bytes
SHA-256: 8bea86ef7a0aaeae8841a903ecc442f25bece64362f5ca6b56c00f0c7bb7ea7b
font_01_sfnt_off00018fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001a7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7BA 19476 bytes
SHA-256: 7a5c32c4e5c657259f6db3888d26288bfa7ce8e5edd01ce1afe0d34574c6d79f

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