Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf0c4ad2fc0a442…

MALICIOUS

PDF

77.6 KB Created: 2021-08-09 15:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 419112492b47a953fe54a054cf295e40 SHA-1: 928b690ab220bb68478671b2e8245d8d4dacf250 SHA-256: 9cf0c4ad2fc0a4428156392d1d04dbb841d4dae8504ad76f5a622e4c0a245e82
164 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload is intended. No scripts were extracted, but the structure and URL findings are sufficient to infer malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://lalinpress.es/ckfinder/userfiles/files/45983976299.pdf In PDF document text
    • https://ctapigroup3.com/contents//files/64144838699.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/97tvmhio5gjfs0emafce9cfv8h/madipabib.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/veburoxof.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/923465936.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/18550467d7c564632b561214aab078e7/fezizut.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/99153220122.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/67915960771.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/62897953984.pdfIn PDF document text
    • http://jpmoto.biz/upload_picture/59007043543.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/88211b9a3369e38cdcefd0974c5259b6/tekerujogitizitunulej.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/rixinepebewemoduj.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080b4110f7fa---nemiwovumebedaw.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a51356bad---58424830722.pdfIn PDF document text
    • http://1960vonsteuben.com/clients/d/df/dfb5e1b83ea85bfdc5ef1da934264264/File/molos.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfb0b1cfa3---81627052054.pdfIn PDF document text
    • http://teplospectr.ru/images/files/13292670006.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/dd59d9ab52bddcaa64f4f147350ce303/58858674615.pdfIn PDF document text
    • http://omak1968.com/clients/71178/File/bewazibuwase.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/fmlun3cp033sgmcpo4c9u4vgmm/76402276479.pdfIn PDF document text
    • http://icbiz.ru/userfiles/file/17747225329.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607683805accd---58978563236.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=defaulter+song+dj+remix+download+mp3+pagalworldPDF 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_off0000c910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC910 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE122 17144 bytes
SHA-256: 8bfefa318a49510981bcf0866b276d71371c3478eaded9802172ff161148b4ea
font_02_sfnt_off00010e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2C 11432 bytes
SHA-256: a3b8a371fcbb1710df35f09e65d7bb417821ad9bf6398faab2309c1f531495f2