Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0b85e36cb6b8fc…

MALICIOUS

PDF

121.5 KB Created: 2021-07-05 13:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a134e0b8774935f2cb7cad170e2d5605 SHA-1: 0feaa8e86e2c705c297b42ce63a65f73d816984f SHA-256: 0d0b85e36cb6b8fc92acb84ade1665cef966ad1b2dc80b09573b0c114134ad2d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document's structure and embedded URLs are consistent with a campaign designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d34bc60571---97573217099.pdf
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/40107199234ab3a33359e0b90a4f551b/83773302300.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c733435b30d---85928019545.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2064b648af---93097723785.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a13ae8a2b1d---40361873601.pdf
    • http://21cedu.com/pds/userfiles/files/5051457797.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16085d0cc202df---26973339807.pdf
    • http://medrea.ru/upload/files/21549382092.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/lssc2q0644mt72mrpucf597vn3/bimovixujekevogokop.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8201e1a18---40595291333.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c363eed72---10691234749.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/4a0bd0df6d1cb630b298e52d623b8ad8/zadukujugagukaneve.pdf
    • http://allprintusa.com/admin/images/file/22187736750.pdf
    • http://jaatkinson.com/userimages/39146941938.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c7b39b0a1---27919317883.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/0fb0dc977c068c7f4e9d766bb6552c3a/koguxasizazoji.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/bd1e5f9c4b659230f158ede1a1420ce3/rosojaf.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dec54ceda3---temofirexabe.pdf
    • http://yorkiematch.com/clients/6/65/653dc45b8f6063886304ac4260dbb99c/File/ritatarekukosovivu.pdf
    • http://ekopaczka.pl/imgbrama/files/wunigowoluli.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16088ff579d7ae---98847059277.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b155af6cf4e---megevazujoko.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/m7fneph8qulaqth2k323flero3/rifeji.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=bird+with+red+chest+and+black+and+white+wings
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000160c7.bin
5f3495e86a71f7a5ebe9ec0d61c830f6645aea3d960774f63de8f2069d1122df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x160C7 16264 bytes
font_01_sfnt_off0001769b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1769B 16792 bytes
font_02_sfnt_off00018ead.bin
e846bf792fdee4166af50c645b9e6892bb9ddf487bcbb6d9cbcfd9cd6c6d278c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18EAD 18300 bytes
font_03_sfnt_off0001becd.bin
b317b5337c43e8087bcad0a3a61179b0c7822ac6bc880f7ced131d81f7602d03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BECD 10900 bytes

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