Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd5c41c2266f09d…

MALICIOUS

PDF

82.9 KB Created: 2021-07-19 00:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 9038d097cb16e0171bc964487ba385d7 SHA-1: 4f1cbe29561a639dba9bf340df0dceaa3d6bf121 SHA-256: bfd5c41c2266f09de2e21fcafbd20666a77d5a3733ed89f2bd508201378c8838
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, many hosted on potentially compromised or disposable domains. The primary attack pattern observed is the use of these links to lure victims, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/7b1da299507ba6e5c0a4083d05a7455d/40265160295.pdf In PDF document text
    • https://monyetmesum.com/contents//files/99295357823.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/mifiledebixefesamuvisig.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/wujuwatujuxutu.pdfIn PDF document text
    • https://empirepin.com/calisma2/files/uploads/87497122555.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160b338ac04497---sojufajuvi.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/8o5bk2bt9d7alcns6klhuffek3/22232547086.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16097992180e04---mopiwu.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/17161199900.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4b54ae065---73941659152.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/satizizokosuduxojuxozu.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e975d16941---84101539893.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/22k0v1o3d8skhh0j5pfcuhmrj2/pexakenixirugemufo.pdfIn PDF document text
    • http://nbpcpentecostalchurch.com/clients/65183/File/mirigozokekogijotakewukug.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/b860f447da22ff92ef2a04e366710385/96105610750.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/1a8496f36da3fcb80c7fef90f18141c8/2905457945.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/kazerugojedegarig.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/vuwimukuxu.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/82556698756.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/99333513103.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/5c7df95f4b9af0d1e6467a2a9d21f98e/senuwe.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/hopdm52hodf2eesqhvbhrf40b7/lilujudonelewuvok.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a84c3e3d9a5---kemolozapezed.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0ee819413---93025419643.pdfIn PDF document text
    • http://uptownherndon.com/uploads/files/mivodajifukamon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=terms+of+geometric+sequencePDF 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_off0000e0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D9 10680 bytes
SHA-256: f24b28e907f639e77577409dffe25ee49b524899662be2dfaec91227967209ed
font_02_sfnt_off0001110f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110F 17304 bytes
SHA-256: 460eb17ff44c999c0b8c7510e5337365063da869b798421347473fbd891c9d22

Open this report in the interactive analyzer, or submit your own file for analysis.