Malicious PDF — malware analysis report

Static analysis result for SHA-256 74758b6c8107a68c…

MALICIOUS

PDF

105.3 KB Created: 2021-09-06 11:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 34371c88234ae9b75d2b45dad956d115 SHA-1: 83b81dea718709dcdb38adc7d4f08bd3d1a48047 SHA-256: 74758b6c8107a68cc07d051e6d9ebe3116417414b75d10f2c8bc30dda0abb45e
156 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs and link farm heuristics, indicating its primary purpose is to redirect users to external websites. The presence of ClamAV detection and ML classification strongly suggests malicious intent, likely phishing or malware distribution. The URLs point to domains that are either compromised or appear to be disposable, further supporting a malicious use case.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://oniceh.ru/uplcv?utm_term=meditation+marcus+aurelius+book+pdf PDF link annotation
    • http://getem.pl/files/file/fusimagepadagekemuletave.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/zizixurojadew.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607069a2bccb8---fapilazixareg.pdfIn PDF document text
    • http://fitviewer.biz/files/file/82149525619.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/3e5cc85fa6f7cdfba2c3f410cd0c50a3/nelekixiwabubelogulu.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/76469990257.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/duxelumoriduperevumutipu.pdfIn PDF document text
    • https://lymfologi.se/anvandarbilder/221/files/11514384390.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/30398458203.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/22153335604.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/kemavixav.pdfIn PDF document text
    • http://madang.eu/f_pds/fck/file/zujusowozarit.pdfIn PDF document text
    • http://giustizianuova.it/userfiles/file/89453903791.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/62366128316.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/2201f65d765653851bc8af4ee8035b64/24531465639.pdfIn PDF document text
    • https://copperscraphandlers.com/ckfinder/userfiles/files/donuxipobiponuna.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/dibakilirubisubuxudo.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/sefonubelazigolubegin.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a928f5dba98---woxitatugis.pdfIn PDF document text
    • http://roocenter.ru/upload/file/midumobejogutix.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16084fa03697f2---52243141722.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b86f8a38616---1195647658.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/dejurawedazex.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_off000130fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130FA 20164 bytes
SHA-256: d8f56b80b70baaf4e9b6592e5b09bf2adf5c861cc459d1b5b6102cd2de69005e
font_01_sfnt_off00016591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16591 11108 bytes
SHA-256: c3d6e99c333c2b5dd6b5dfdebad7c4fa7c8d5c46a97758f216598b40db562570
font_02_sfnt_off00017f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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