Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b07a8cc50c9dd8e…

MALICIOUS

PDF

92.0 KB Created: 2021-07-06 08:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 497aa80fe3f67c9e08818bcc8b0f2117 SHA-1: b00562f386c33a5767128cd23aa03e81ae15c9e9 SHA-256: 2b07a8cc50c9dd8e8d2fc40bb70b8177b89697c2d910b7040b3412038ffcc69c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories. These links likely serve to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://ketchas.ru/uplcv?utm_term=carpal+tunnel+muscles PDF link annotation
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761a25c30c7---dofupetarujajifanenawur.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/881bcee6bf177335dea85c75301690e2/bowerejedezefedatarazulup.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff34074814---bodoxesejutupesiverix.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/ei1td4iaq2ce5flrr16hs2h193/56769938147.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099af4f28284---7042871320.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/4388ba50e0007f7ed471fa9a5aca30a2/rezimimalebibula.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/eefd1a8e50121614d83eca32b921ec1f/16399260343.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085269d5a4de---baliko.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/juzuf.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/es9c9o6qk6aiiisi38qem3pifr/finotutuxexokabepimif.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854d78ae15c---wibofurumol.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d62764ed7---83249276962.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/564c52d8c9e63dbf86ecb4a07fece6db/rifulekixalemitefilizani.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608913eb49bed---todiwatuvorix.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210615160433_1193074391.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/31b669ccd77d66c7cb58e5849da480a1/pemuzofubunetibeburod.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608724da486a8---fufedaveforotog.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/rv3e83qvt1ia4r5j06dadoipc7/sorutom.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e727f3da84---terigaxogilojerazozavi.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a015cba28e5---lidijexejusiwizawoborazi.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/zudolofaramezubesekirawux.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756aad37e5a---majipibimonasonibu.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160827ed2ab588---gukusofozepinof.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/keguziravazebaduxorizif.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_off0001085f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085F 16432 bytes
SHA-256: 1f7dd8ab85c862acac65271a755003c6872c9d8538e0e85f3fab9664d8b62cbd
font_01_sfnt_off0001331c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1331C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B33 10456 bytes
SHA-256: 08fbbd9972d9d6d71cafcd1bde0bcad36ca70af57162309e41d1e5e073732472

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