Malicious PDF — malware analysis report

Static analysis result for SHA-256 46620ed6c52873ce…

MALICIOUS

PDF

81.1 KB Created: 2021-09-06 01:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 74b44877d648a3c96d287b22ed0c1dcd SHA-1: c0231b24443e7ce6b236f3a468a3c1ace918b02b SHA-256: 46620ed6c52873ce373eb5d3346b7287ba99ab7e2a378de534977483f0b31fca
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also contains numerous links to external websites, many of which are hosted on compromised WordPress sites or appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://dondepodemosir.com/userfiles/file/sezojij.pdf In PDF document text
    • http://5thaveseniors.org/userfiles/file/87024372763.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607d59f8da12c---54508635664.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160890f40bb02c---xokofufotub.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/83733868102.pdfIn PDF document text
    • https://pellevah.com/upload/files/mutixemazusewav.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/90494660332.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/tizivet.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa05175e22---dojakosiwisorolonowatule.pdfIn PDF document text
    • https://nacituran.com/userfiles/file/43132896452.pdfIn PDF document text
    • https://vietnamairlinescorp.org/js/ckfinder/userfiles/files/36386682151.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ade8c3edf---11085141864.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbb5f51fc3---xazuzawozogetikavefaja.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/rupusimij.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6997676b4e---wonuwulivolitaladarozo.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160af50a8878be---dikotaxiruwotojibejisazid.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/39908487082.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/vapak.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/buwopirulidotadidevawe.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/eb67000dc080c81798d504d89bbafc8b/sewitofafemi.pdfIn PDF document text
    • https://ryokanclub.com/FileData/ckfinder/files/20210701_0F0C29484C438C72.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/c690e7e929e01257c6d6ef779b598744/gazagagevipolisorurodajep.pdfIn PDF document text
    • http://ithaca1962.com/clients/41687/File/wimofofavugux.pdfIn PDF document text
    • https://eitmedu.in/ckfinder/userfiles/files/64562139725.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=whirlpool+under+counter+ice+maker+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_off0000d572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD572 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED89 10796 bytes
SHA-256: 072d4571c76b200e696fc75150221af342d5c3e95568e828700369878bd6c692
font_02_sfnt_off0001062d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062D 18868 bytes
SHA-256: f73131e2fbca7b7f6b54185d7afe3c251a911e46addee4668c267050a730bf1d

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