Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d260d3773885482…

MALICIOUS

PDF

75.8 KB Created: 2021-09-04 08:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8a50f851e6d4caba144724354f18d511 SHA-1: fbe12d31479beb0284ad18872f33b306c3b947d6 SHA-256: 0d260d37738854822eefd9d624b884e0b6cdf5966cb8579914900891cb56789d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. It contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting it's used as a link farm to distribute malicious content or phish users. The presence of external URIs and link farm heuristics strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 https://oniceh.ru/uplcv?utm_term=gopal+sahastranaam+gita+press+pdf+free+download PDF link annotation
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089e2c70194a---47859116194.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/24701959713.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/7b9b0a9a1126a700709eab382a825bdb/kudisedajalaxevukexilofur.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610833c78fe04---57870701233.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/66358607742.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/1911435bbfe2b64020ae14583f5a5080/52362716800.pdfIn PDF document text
    • http://sumnerclassof1976.com/clients/4/49/49b54eafcc86ae0c30eb104ab8b91c7c/File/8608593913.pdfIn PDF document text
    • http://email-database.info/userfiles/file/bowizusezonar.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/lesogodegibinuvanuda.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/g9vr43vjj4lpj6621ebm6vs895/lifezonimuto.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a26c2f3d540---90002567689.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/5c3uokuvkegc0d83sompcec7ll/37609330949.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/qjshtu40cb7cfu1qdurnciio6i/mutedi.pdfIn PDF document text
    • https://europartner2.pl/uploads/kugiviliz.pdfIn PDF document text
    • http://vinaktv.com/storage/ckfinder/files/zolimusikegisinarofisum.pdfIn PDF document text
    • https://gkscam.com/userfiles/file/34708057397.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607974f0e2e72---52367554286.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/78192353015.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210523134551_1849812216.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/zamavepotezij.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_off0000be6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD681 11068 bytes
SHA-256: 13bb52cd1fdc4f4e760e2edc4c3af2b1949d2488bcdd9f3200f8cdf7353f4625
font_02_sfnt_off0000effc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFC 19472 bytes
SHA-256: b780b7e8a241ccc7905e021cc00af904dcfb0ebf6e87aca52410dbd3c25bd4bc

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