Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e9a0270f8d6d315…

MALICIOUS

PDF

82.1 KB Created: 2021-09-04 17:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 39a6b96bcc6a7230de3813538ef5deac SHA-1: 54febf6ac9453600de37f1a87303eaeb78faf4d4 SHA-256: 9e9a0270f8d6d315316f26e08473a5a4983bb18cb15644366ee6188562799af4
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, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards the document's primary function being to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pixomot.ru/uplcv?utm_term=firm+definition+pdf PDF link annotation
    • http://sammyuriasproperties.com/userfiles/files/jizobati.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/38281bed38c105946aecb723b0190ab0/99350569505.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cba134bd957---32248543801.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db696321914---7490200862.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b221842afcd---53674782038.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/84383a6dc0fae77393f1b37f50be914f/zafimozip.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/sesezitasipeturizamesivu.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/6869269444.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce1f6d9ca1---mekusewalewuzaji.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920db74fb54---98497966827.pdfIn PDF document text
    • http://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/lupuxudupobejebigafedi.pdfIn PDF document text
    • https://realxenon.ru/uploads/files/baxafafezo.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/93625307544.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/wazaxudazovemevemik.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/favikaw.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/jowebi.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/t0250d77ju8b0l0c0jhok9loa2/wupenovefobimubebonusuril.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16076656f8f288---rivovur.pdfIn PDF document text
    • http://eva.am/files/1249a1894d3b2097.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/8f185420f0c0c90d7046783d6d7d0e2b/39525103498.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/b25112a400cf543a48f623037db70ad2/bagunowenijuwadunul.pdfIn PDF document text
    • https://artenika.pl/fck/file/wejifujewigon.pdfIn PDF document text
    • http://gpshardorawal.com/hemkunt/userfiles/file/56791781952.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610d2cebf2bed---tixogavavijufuligusebupa.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/tna97qubrff6sa762v5omml7nr/nanibogiwojuzi.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_off0000deaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAF 10260 bytes
SHA-256: 131d1d0d02f56491b1a9aad5c5fc17cb3adaa11712ca48110e34174c89574e4d
font_01_sfnt_off0000f5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A3 17704 bytes
SHA-256: bf8a6f30909c1728cfe298bc8f3d8c258affa8a127e5b2cf3a20270c0bbc7ab1
font_02_sfnt_off0001233a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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