Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0747922efbdfbda…

MALICIOUS

PDF

82.9 KB Created: 2021-09-10 04:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d8ae33551c8acb1d4b131f2bb11a0055 SHA-1: f47828d35a1e73412eb7c6155ee27fcf44aa9e5f SHA-256: c0747922efbdfbda7bed9eee20d09d0be91d577d7c05f1fea3e8a0fe6153ca21
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS uploads or appear to be disposable. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, but the overall structure suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • 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 http://hycxchina.com/filespath/files/20210910081145.pdf In PDF document text
    • http://ridendo.cz/files/file/ruzimafejuna.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/rezisivirexalazodedoromam.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/oibdhn5krjtgdpe9h093eca2vr/mapezetujevude.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/pasumonalowusaj.pdfIn PDF document text
    • http://getsolarnj.com/userfiles/file/55122902499.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46474513569.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/76829444653.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-9-8/20210908013039990396.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/lefepipofamuwelalus.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/bivanewifimifotavapu.pdfIn PDF document text
    • http://studiogeologicotrilobite.com/userfiles/files/zumuzejegajoxipabudi.pdfIn PDF document text
    • http://menifee.hanasushichoice.com/uploads/files/mevulovamemo.pdfIn PDF document text
    • https://finliz.lt/i/File/17745431749.pdfIn PDF document text
    • http://geomanteia.com/userfiles/files/13922321958.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613754215f9b9---gujebogukunogur.pdfIn PDF document text
    • https://7mark3t2-7aya.com/contents/files/kivabutaman.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/28204770435.pdfIn PDF document text
    • http://kino-cosmik.ru/sadm_files/zanobabukosuxazob.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382f8955658---39618698979.pdfIn PDF document text
    • https://indicaperu.com/userfiles/file/60840471707.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/zinezajuzud.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/92041253288.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=bloons+td+5+mac+free+downloadPDF 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_off0000de1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF631 18064 bytes
SHA-256: efb1ac53547ee4f84ac2f2f8a70c8c38c7a23226d981693f9a13c5957ca71eea
font_02_sfnt_off00012519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12519 10816 bytes
SHA-256: ec4a3e6b87c43ca986c66b7ea09caefd7509e1adcddf0860ccd52c3628bbf4de

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