Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a46c386e43a4aa…

MALICIOUS

PDF

73.6 KB Created: 2021-09-13 06:36:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ddd29dba04493b31470a79238792e016 SHA-1: c3b1493bf298e189fd514e949547cb0264aa0f23 SHA-256: d2a46c386e43a4aaa8cc598e1b114ce3ee9515c577bbb0584b1f8b7d498230d4
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://www.pollackmihalyiskola.hu/ckfinder/userfiles/files/67729543617.pdf In PDF document text
    • http://bkm-market.net/userfiles/file/98496906687.pdfIn PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/16466711447.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/11150948819.pdfIn PDF document text
    • https://quangcaowebsite.xemlaco.com/uploads/files/diduwubi.pdfIn PDF document text
    • http://gaia-onlus.org/userfiles/file/79250902371.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/telalixowagi.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/zisujo.pdfIn PDF document text
    • http://yaan121.com/uploads/files/202109130936073367.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/10ac80635fa49d831965acd8f3860d01/79164905433.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/wuwaz.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/zibozina.pdfIn PDF document text
    • http://fratellibeninca.com/images/file/19062642009.pdfIn PDF document text
    • http://gidromall.ru/img/uploads/file/kudulusaka.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/10902553205.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/matokebixuxosolujikip.pdfIn PDF document text
    • http://www.videocopilot.net/assets/public/ckfinder/userfiles/files/70416056350.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16133188f77e10---nagirebadezufepi.pdfIn PDF document text
    • http://baovecongtruong.com/upload/files/29197249323.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/mesezurezadojuwetiwiva.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/19232858830.pdfIn PDF document text
    • http://bushurov.ru/images/files/94344333051.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16137a62e0a3c9---divawaxamapogebedoroxit.pdfIn PDF document text
    • https://premiersuli.hu/files/files/vaviwimofesawexurajanijo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=hp+android+dibawah+1+juta+kamera+bagusPDF 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_off0000b9e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E4 11384 bytes
SHA-256: c224eebac0ba27db5c8df5d8a2ad8185830560df5f3347b6b8bcf573301ed43d
font_01_sfnt_off0000d417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD417 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC29 16984 bytes
SHA-256: 750ffa673fb648ad3927cc96856429da1adc67b0ce60a7e37ed6c324f80d0ebf