Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d1e149f9b8a398…

MALICIOUS

PDF

85.1 KB Created: 2021-09-06 20:35:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ba87635d7a415133654070260d43c3cf SHA-1: 38b305b71a7e99dc0bb235a03f13027b1bbc8623 SHA-256: e3d1e149f9b8a3984ed3266e7615e374ad7cbf6daa3640d37a6f788c3c42f660
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 https://smidgel.ru/uplcv?utm_term=yes+bank+rtgs+form+fillable+pdf PDF link annotation
    • https://damiel.eu/userfiles/file/riranilula.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7632518a3---66132004749.pdfIn PDF document text
    • https://zebcom.in/userfiles/file/karof.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a37e593611b---zawevemidedakorono.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/99993470099.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/11db0708a92216555f593a20ea0e8c5f/bibidokuwutenexotoraxaxil.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/852d08a118b610d14f6e3d40620f82eb/danitipepavutuka.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/7d31a1c2ed362fd6312ab87070fe5af7/ketasazulopilumujoso.pdfIn PDF document text
    • http://myblindz.com/fck_user_files/file/82230850549.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/vunep.pdfIn PDF document text
    • https://brickbodysupplements.com/newerac2c/userfiles/file/50638124487.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/2gbcl8ugbt3l8fmtoiv6qlm0i1/9474655570.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/b019366cab70a5683adf9df4746e43e1/8382033492.pdfIn PDF document text
    • http://limoride.net/gallery/file/dufopibomafogoxewabu.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/87423718694.pdfIn PDF document text
    • https://najarshi.com/basefile/najarshicom/files/12469862244.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/17380671914.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf7050acd5---12936432942.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/g1tmrb6d9oj1ag7da7b4idau9k/39884871705.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2a1763b9db---faravuwekewuvid.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/9bd12ff8f71295e7cf518aa75e48220a/66342841817.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae25e9ebba8---petanapowi.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4ab8b1510---54030155389.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/daffb2a4a3b336540d7d6ce085be101c/65017861579.pdfIn PDF document text
    • https://latrinquette.com/upload/editor/file/zokiwoxuwabiludotus.pdfIn PDF document text
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/62480234754.pdfIn PDF document text
    • 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_off0000e551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE551 11056 bytes
SHA-256: 60fd379bd344abf10cfde525de0fca540bae6f24d94ac758d1a7e89bcc6215a1
font_01_sfnt_off0000fea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA9 18392 bytes
SHA-256: b36c44f3a83fb4b0eab3de1064e6ad1d5f2ba87fe881d76358ac8503b260ad7a
font_02_sfnt_off00012eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1