Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f2ba52db1fc4a98…

MALICIOUS

PDF

89.3 KB Created: 2021-07-21 11:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b510cc660163d42ccc27813ae57d5ab2 SHA-1: 817eae6a5755c262ad74800a3608ae059fe85fb1 SHA-256: 2f2ba52db1fc4a98196b9452e889afd504f2f1593237d96db833398d8e904296
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS upload directories or disposable hosting. The primary purpose appears to be redirecting users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://adamlegal.com/userfiles/file/31082500138.pdf In PDF document text
    • https://2acontractor.it/images/file/97188033636.pdfIn PDF document text
    • http://xenangheli.vn/public/files/vifisuwunovivatumebapubil.pdfIn PDF document text
    • https://esvigo.com/upload/files/tuxelakazetaba.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/49873512988.pdfIn PDF document text
    • http://araonline.hu/uploads/file/78354522455.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/8c4d0fb1c0728c693a2f131357d2838d/jobamiwolaz.pdfIn PDF document text
    • http://tweddlefoto.com/files_contenidos/upload/files/sanaguzetuduremefefo.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f34718e12---83215412500.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/fifupakunogidetakug.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607100fd2bc7e---vunadivajalolawani.pdfIn PDF document text
    • https://alsharqcc.com/userfiles/files/95386866509.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/da89ab28826730913487647903b80204/pizedazapovupamilufefove.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1624161037.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb053e644f---27439292198.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077974e3fb49---78708445721.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8e6c51ff1---kowotikixifilamogog.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/362f44146c1cc226acb02f2d69717726/tobivasetarebamujeku.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a791bfeb12f---6763676422.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/0c4ba8d907bbbd3e74ed8b45ebcd4a48/logugi.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3945f75830---9888959949.pdfIn PDF document text
    • https://mgogs.com/mgfiles/file/23295109500.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=work+energy+theorem+in+rotational+motionPDF 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_off0000f9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CF 17368 bytes
SHA-256: bbe22f0afa2c8deccd699e93c387569cda08fa58a307d9f982d8fd4cd977d7a4
font_01_sfnt_off000127b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCB 10588 bytes
SHA-256: 115e61d4f0acf558479d157f68ffc81cfc938e1aae6cf66b4a6ea4ab07b22a34

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