Malicious PDF — malware analysis report

Static analysis result for SHA-256 111facec1fa2b648…

MALICIOUS

PDF

74.6 KB Created: 2021-10-07 18:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 116aadee1067c57a9da4ee85190fa009 SHA-1: 7944ece29d8c8725e523004415dc30c431bbafd9 SHA-256: 111facec1fa2b64837f9b7fc02a5d8252a46262872b9a4df0e933d3ec57db6f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://www.binghan.my/userfiles/file/13523200779.pdf In PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/3682927070.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614939660407d---vadip.pdfIn PDF document text
    • http://sentidoseg.com/resources/original/file/sogogenipawawu.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/juveguwanuvozorakidawezik.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1615e6247cee6a---wijuvesudizofemexifidaju.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/22339772086.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/piwivubexi.pdfIn PDF document text
    • http://motorlustor.net/userfiles/file/74424233933.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/81480126257.pdfIn PDF document text
    • http://thietkewebbacninh.com/webroot/img/files/jesapelupifasuduwu.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/70191993351.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/nuziwad.pdfIn PDF document text
    • https://cevhertemizlik.com/userfiles/files/91832149024.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/nugajawigavu.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/1357242533.pdfIn PDF document text
    • http://www.brickchamber.com/ckfinder/userfiles/files/55329094113.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/37473847239.pdfIn PDF document text
    • http://lovepetclinics.com/file_media/file_image/file/weruxubunotofelositugejeg.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/57683373870.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/80829807081.pdfIn PDF document text
    • https://www.gryf-wet.pl/ckfinder/userfiles/files/wagixino.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1615b8eb4b278e---tuzerasemupitogavikufazo.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/sofujuvukigegumefid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+make+a+fast+forward+video+imoviePDF 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_off0000c1eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FD 16384 bytes
SHA-256: 1f68f1b9504d704aa98660f446c9ffba04743e80c28aaeb0a2286793168f4da7
font_02_sfnt_off0001042b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042B 10600 bytes
SHA-256: eb56f7ce806245444e2b7c6f5a303d0b8dcd0f43b6b2ee432f5e9e80adf9b739