Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ce54f9cd83a915…

MALICIOUS

PDF

83.6 KB Created: 2021-09-17 21:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6cc9065586dd13d9250556a424bf2439 SHA-1: 258a8af1c81a51a9b425bd767ad4084e78f85c09 SHA-256: 34ce54f9cd83a915d4d155990b5bb4bd2416a45e250cb7b21a33c6abde860099
184 Risk Score

Malware Insights

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

The file is identified as malicious by ML classification and ClamAV, exhibiting characteristics of a phishing or malware distribution lure. It contains a high number of links to various domains, many of which appear to be compromised or disposable, suggesting an attempt to redirect users to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crysiq.ru/uplcv?utm_term=manikarnika+full+movie+in+tamil+free+download PDF link annotation
    • https://clicksnepal.grnca.org/img/files/files/durakazepafefuf.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/92607119943.pdfIn PDF document text
    • https://seger.cz/userfiles/file/jimatisadiradokodibuji.pdfIn PDF document text
    • https://kanat.com/upload/ckfinder/files/dipoxudesazid.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/jewuduxesorotarefusonimok.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/37892588214.pdfIn PDF document text
    • http://quiltingacademy.net/fckeditor/userfiles/file/77835330147.pdfIn PDF document text
    • https://reformedgeneration.com/userfiles/file/wigolofapigoguti.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161343acd57994---45384729155.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613c6ccdb151b---xuvipalinutize.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/3758185403.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/l36p0m97kgvj6b9ks8vmej0v5l/93582409540.pdfIn PDF document text
    • http://graciaindoutama.com/kingkong/userfiles/files/runosaximarazede.pdfIn PDF document text
    • https://alasclub.gr/neuro/ckfinder/userfiles/files/6281934274.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/wupetax.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/u1lqb0rpo5akv40jo8phv894q4/73065604344.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed83814a2c---9774382051.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/7c9f6a091f1a8f541ddcb6d2d426a155/gulisajasewebokesegopuge.pdfIn PDF document text
    • https://agermag.ro/mm/file/vedapizunonemunenaba.pdfIn PDF document text
    • http://eko-baby.ru/userfiles/file/88686923491.pdfIn PDF document text
    • http://xn--b1adrijbbb.xn--p1ai/upload_picture/debebokegupakorezepegew.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/86064632960.pdfIn PDF document text
    • https://scalping.ir/data/files/file/54690691049.pdfIn PDF document text
    • https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/13613593103.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/93283383924.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_off0000e23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA55 10684 bytes
SHA-256: b6e3b2de6d8ef46fdbe6b1103f5741c1075f784ed2d0d223e2928554c7a5a207
font_02_sfnt_off000112d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D4 17752 bytes
SHA-256: 37fa70dda9e933950bef0f623800b08e324cfbf2d622ebc18794a392b7e7edf3