Malicious PDF — malware analysis report

Static analysis result for SHA-256 83d8ee2b696e0e42…

MALICIOUS

PDF

116.0 KB Created: 2021-08-14 03:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f60bdad210ce0435a270025a8f50391d SHA-1: 5d75f8b945983d8be23d566584bc4a17d24af5bf SHA-256: 83d8ee2b696e0e42bcf3e1f4d92c63879e2862065128d636c753e6d0341b893d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous links to compromised websites, suggesting it is part of a link farm designed to distribute malware. The presence of a 'Password-protected archive handoff' heuristic indicates the document likely instructs the user to download an archive, which would require a password to decrypt, a common tactic to bypass security filters.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609891485deff---vogasozulatavunefukidil.pdf In PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ab5a8416f---fevix.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/gofapokimuzugonida.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/d86cfd87cb865ee73dde29491184cac9/betafegabifolekowiv.pdfIn PDF document text
    • http://csc0898.com/userfiles/file/20210620233541_mie4rm.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/0808ff46221d3c59b749c708a1237e39/26130799317.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/fd26ecf17b582267bc9374328fc91027/vugeravuxobuzodolov.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16093c1b4c4cb8---semizovokoravitufopitod.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcc1d09c1b---xenomiveguzefi.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/93349871767.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160882b3895691---dapukofikogiwosopedebob.pdfIn PDF document text
    • https://lifesmart.ro/ckfinder/userfiles/files/xivebud.pdfIn PDF document text
    • http://1night2day.com/UserFiles/file/21648588285.pdfIn PDF document text
    • https://ibrahimkoc.com/images/Media/files/baxisipibufewi.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2330c6c6d0---gubobo.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/wofaturokudobonedodozozo.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/34e07b72587acdaa73193f8c86f09c30/99965219742.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102dce7cac79---dixuvamobosemiluwad.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/54258931824.pdfIn PDF document text
    • http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/044a01fd22da9369bd993fe37c5bec55/lesonulevejizevekibe.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/ae5deee554686bf2efda5130583db8a7/gipirodupe.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/kc316n406vpu9ggt3lcumcp2o6/84454029179.pdfIn PDF document text
    • https://dineflon.com//files/71656982476.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/duvojukonirijapetus.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/406c4d2043da4beb97ea7abc437ea604/97487627798.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=crash+bandicoot+ps1+iso+pt+brPDF 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_off00015c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C57 20704 bytes
SHA-256: 1072cd515cd981184ba25a3e48e18587dbab2ecba98b34163e7519933234e265
font_01_sfnt_off00018f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001a75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A75E 10656 bytes
SHA-256: 733f0dc77a3ba01ae5a7f69fdb8096aeb8ef9eab6385887d7f1e107802a0ead0

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