Malicious PDF — malware analysis report

Static analysis result for SHA-256 0acb2b4f8218594a…

MALICIOUS

PDF

103.5 KB Created: 2021-07-02 20:13:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ca88f87c120a6b116dacd8b1b5779080 SHA-1: a928179aea099566953079667cd6bcc3405e1461 SHA-256: 0acb2b4f8218594aef65777383d1859787c2bc52c1214e35847483a5646cc085
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs that likely lead to phishing sites or further malware downloads. The presence of many distinct hosts and the use of 'utm_term' parameters suggest an attempt to lure users through various deceptive means.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9767

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://synerhu.ru/uplcv?utm_term=hey+there+meaning
    • http://robertfeinberglaw.com/images/edit_images/file/27392606191.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/7932c012368d9a47004507a5d49a96ea/49836808182.pdf
    • http://ehsclassof64.com/clients/b/bf/bfa5c4411462ceee4a19e543862d902c/File/94254792334.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb200a4633---zajetumarunep.pdf
    • http://parcfamilyreunion.com/clients/b/b3/b3ae52aef0329bb57e848b27182677c8/File/84016746468.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bacfbb284a9---xedodod.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5670bb86da---zuwefedile.pdf
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/p3qobnt2c25gs14npmvikd6sjj/wogodurufewiboxutazek.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/neb7o0audkri4fpr4knae0f7er/66914841728.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/80e1b18142f9699a3581eeabfc9252e0/83550784864.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b37261b1c86---vonotufiv.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/rvc996i3fak3c8vnts7guuispr/36025510630.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/38fd32d191df3e0e8b748a1f2c961d7e/dunivirasasidelikekaza.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/45cf3f5aeed24cb150d4a50fc099d887/9324614190.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/i8uq2j4kgp38pnriohpkd26868/lavujadibawesoderoroxi.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/vm2fu0816d1e9ttn6cnoo6e6j0/33214877376.pdf
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd1776a5d9---xefaxogadovovivegi.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5beb61f4c7---rakirorode.pdf
    • http://ypdtools.com/ckfinder/images_store/files/lefita.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099ed4cb0ac0---12771563303.pdf
    • http://vimar.ua/userfiles/files/tikodok.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/tl3teqvflb5s4q17n0t9qtqaif/2269987091.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cb116954d---87655094660.pdf
    • http://red-persimmons.com/upfiles/editor/files/pidafuwa.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef4ff1d655---turuzuposogelisikute.pdf
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000171fb.bin
d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x171FB 18328 bytes
font_00_sfnt_off0000fadf.bin
2967df0766717c89fce9089a3015b924a2dee6d656f9353e78dcf4114f3efe97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFADF 10324 bytes
font_01_sfnt_off000111e7.bin
87da004c74ef90ab3dca50cebc51372439b48302d19e9892c65a0f5582454624		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111E7 24280 bytes
font_02_sfnt_off00014c74.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C74 16792 bytes
font_03_sfnt_off00016481.bin
a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16481 3464 bytes

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