Malicious PDF — malware analysis report

Static analysis result for SHA-256 249e34fac450e498…

MALICIOUS

PDF

88.7 KB Created: 2021-08-09 21:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a0469a543b6c11803f2297ada03ef79d SHA-1: 60aa0903ed22ecea967d9f2661a30d75268babb4 SHA-256: 249e34fac450e4987b107704824bff49a88e70e088ea7e9ce5512b74a4b7f60b
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Numerous heuristics indicate the PDF acts as a link farm, embedding many URLs pointing to potentially compromised WordPress sites or disposable hosting. The primary goal appears to be directing users to external malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://catamma.ru/uplcv?utm_term=minecraft+chiseled+me+mod+1.7.10+9minecraft PDF link annotation
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e36a582845---37948665001.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/elovjs0kpo1d63g7h2ao5j9rq7/sogegitetidufasune.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce4378b0da---62448615382.pdfIn PDF document text
    • http://aps-mes.com/files/file/jeliferegixeturukijekab.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/49854533532.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/bizonozimes.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f188b9b4820---salixubulaneketipal.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b895b5b25aa---desixafowadodamamukerafi.pdfIn PDF document text
    • https://akemi.ro/hirek/file/lirademadeg.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c3cae0eaa8e---27538815262.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/zagonexojejakodemaza.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/16951428041.pdfIn PDF document text
    • http://csc0898.com/userfiles/file/20210615210133_mvsfij.pdfIn PDF document text
    • http://zigzagontwerp.nl/sites/default/files/file/juziviwotadebasuz.pdfIn PDF document text
    • https://lysgaards.com/ckfinder/userfiles/files/35012450322.pdfIn PDF document text
    • https://reniuved.it/file/25940850562.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/tedipexek.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/24579237237.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/3818654326.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf2db1e8022---7570524023.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835ce30499a---67993014765.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/dezawafodidanow.pdfIn PDF document text
    • http://zubrcup.by/files/files/68933714713.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/36itqva3uj80lh4d8v5sto28p3/pugofekoxotozi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC91 19520 bytes
SHA-256: bf688569e7af898e0db22ff5e40b0e40bb43d9576b5c2793ca6de586f6495ac6
font_01_sfnt_off00010c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C61 11192 bytes
SHA-256: 775c6e15a2f0e10e777b0413f0d0e93e6e41a4b73f33a07018b72ed5a311cc9d
font_02_sfnt_off00012675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12675 16064 bytes
SHA-256: a013ce2342554bbd70a9f85285a6053b67e9b25eaba0dd22223cc179b1b1ea16
font_03_sfnt_off00013b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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