Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e46e5fd072e400…

MALICIOUS

PDF

87.9 KB Created: 2021-09-01 07:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5c97fd66a8b2de33e209c42181c847af SHA-1: d67e2b4e9a95589c3d469201bb0749fa7d387400 SHA-256: 14e46e5fd072e400f738715d0901b586079548581574bbefc86afb190ee62c08
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS uploads or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of multiple external URIs and the structure suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://petek.biz/resimler/files/75508913123.pdf In PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160db5fc7e8aab---buvolakexewonuvavod.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/14472759985.pdfIn PDF document text
    • https://rmduncanrealty.com/userfiles/files/440828007.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebf38b802e---30441200265.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/06/28/file/85201905975.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/55796219079.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202107181802359470.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/98254159621.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/goboxusetoged.pdfIn PDF document text
    • http://hamdard.com/hamdard/app/webroot/img/ckfinder/userfiles/files/bikowakuwabojido.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/lovudatusod.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/9f89a45707c9f591181799d0f772e920/vogejixetavikodaluzi.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878d2742742---togikadamanawo.pdfIn PDF document text
    • http://topcudental.com/img/userfiles/files/90579594048.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16120a886ad5b8---32143781892.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/wenivum.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/q8v4kdfbbmv1dcpub5qag6dcsk/55586451563.pdfIn PDF document text
    • https://dineflon.com//files/55114620578.pdfIn PDF document text
    • http://scuolascifondocortinadolomiti.it/userfiles/files/gugamexowuzemazobu.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/36890384627.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=watch+beauty+and+the+beast+season+1+episode+1PDF 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_off0000ee9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000106b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B0 19708 bytes
SHA-256: ea92f103d897b26aadc6e25eb4760bc2bd016b9895c46d0ee82714b3f3be61bf
font_02_sfnt_off0001390d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1390D 10864 bytes
SHA-256: 1a1e0deaad37fecb2bd50a9eb171793fec8d83b84c94226164bbe7cfe3785f93

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