Malicious PDF — malware analysis report

Static analysis result for SHA-256 df02f2b0f87e82d7…

MALICIOUS

PDF

82.2 KB Created: 2021-09-21 04:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c3c06bfdfd2d2a95e3d775f9d860e881 SHA-1: 85720f48c4e376fa86b93ca7f87167486b61b47d SHA-256: df02f2b0f87e82d78ede6c98737c9e4372f4fcc66b7c143fb980305fee64d742
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, indicated by the 'SE_PASSWORD_ARCHIVE_LURE' heuristic and numerous embedded URLs pointing to potentially compromised websites. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of multiple external links and the password-protected archive lure suggest a multi-stage attack designed to deliver a payload after bypassing initial security measures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://ketchas.ru/uplcv?utm_term=watch+megan+is+missing+online+free+123 PDF link annotation
    • https://libertyrealestate.in/ckfinder/userfiles/files/84596774454.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613164b8d3d28---mixelovusamazuzowup.pdfIn PDF document text
    • http://mcutech.net/files/42975280625.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0006cb79a---xebizeduxo.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/40638563773.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/woravuwatirarekazubalefid.pdfIn PDF document text
    • https://drddvichitra.com/userfiles/file/zikenidibuledonuzulunebo.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16132e9933649f---86712198706.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/3446702533.pdfIn PDF document text
    • https://dacola.com/upload/files/82027440244.pdfIn PDF document text
    • http://ylplj.com/ckfinder/userfiles/files/24456453736.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/42534883636.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/73893030720.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/70712607744.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/nibulaxeravatokovojizenex.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/6kdad7ctaqujm7rahkpc6buod5/lenabivapipo.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/104t1q8laq4voeba7fqm9csc5t/jobanosetejawerodas.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/fomitir.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/boxaxonuxaxolib.pdfIn PDF document text
    • http://fullx.net/files/junaju.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/48875416081.pdfIn PDF document text
    • https://ww150006.linebot.net/upfile/files/20210918064730.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_off0000da8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8B 17900 bytes
SHA-256: f2ceed49d92240acea3d7fddd83d7377dbdeb21af3b63881719b44ff90197649
font_01_sfnt_off000108ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EA 11120 bytes
SHA-256: c1e017cb1b1c3385b74e8764eb0db58be8c9c2cd89f6a88e2d26d484a66efb82
font_02_sfnt_off000122da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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