Malicious PDF — malware analysis report

Static analysis result for SHA-256 29be11e01e441ca8…

MALICIOUS

PDF

82.4 KB Created: 2021-09-19 19:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 484e35dadc6de73764554c7a4ab5adae SHA-1: 0f9f25f15d0be34c4a863a91e40e09ef76e7b5b8 SHA-256: 29be11e01e441ca8cbfdf29febd05cd8b489c8d708664b5812a9884ac044a88b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://nomylo.ru/uplcv?utm_term=push+mail+app+for+android PDF link annotation
    • https://tjpapigroup3.com/contents/files/48581582545.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/71098436954.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/36827592516.pdfIn PDF document text
    • http://teakdeck.pl/files/file/dawarolofoduz.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380e9050883---retenuxapuviwerixuzizep.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/31734717423.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/01e46ae0825f704b16e7105e3825fa4d/tadajijekalixusid.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/3d092fdb5039d9106cd28af117b0c500/vukapilamorazu.pdfIn PDF document text
    • http://talcmanagement.com/uploaded_files/userfiles/files/83010972550.pdfIn PDF document text
    • http://leton.pl/userfiles/file/88938284891.pdfIn PDF document text
    • http://dongphat.net/upload/files/fufun.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/wudibajuvirova.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/joguxafu.pdfIn PDF document text
    • http://casaperugia.fr/userfiles/file/xuzuragefebuzafotoribog.pdfIn PDF document text
    • http://qlinairnv.be/userfiles/file/fotowimanilevarumaperafe.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161335dcc80892---pepinasal.pdfIn PDF document text
    • https://www.karelo.com/uploads/File/tewidiluworezorevuwazer.pdfIn PDF document text
    • http://janaturismointegrato.com/uploads/file/nelezimajalawitid.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c023e4d310---6365580859.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/rijokolo.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/lexifizujupi.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/8217a684b9189573e078c466a2fa0305/levipexet.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/dawoximanowew.pdfIn PDF document text
    • http://pololanna.com/user_img/files/40580027929.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/sorilupalomemutukir.pdfIn PDF document text
    • https://dolphinsolutions.net/ckfinder/userfiles/files/54083156890.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_off0000deb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB1 17228 bytes
SHA-256: 3dd8897a098efefdc9d8e05c7c96b5ebe925aab393c4c5492a64d0d1243723d7
font_01_sfnt_off00010b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7A 10636 bytes
SHA-256: 2d5b1679c8d9c30a37f94ab3f62e17b1d825155497946f8efb4f1c0306f0eb68
font_02_sfnt_off0001238a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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