Malicious PDF — malware analysis report

Static analysis result for SHA-256 e099f2348af1e3df…

MALICIOUS

PDF

79.2 KB Created: 2021-08-10 20:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9712f3921a90269ba83c45f56460c6af SHA-1: abd12a5f54d53eb576fb64cf1f0804bd6e621af4 SHA-256: e099f2348af1e3df0e459398ab9f6c0ae0497f02e4f5ebc53d708ab481627791
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and embedded URLs indicate malicious intent, likely to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/e1f9beddc30716c904d7ab248a1a1de6/3275313417.pdf In PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bda019947cf---59750284446.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/81b69e98c8c8c124f64d510864c390bb/27859251989.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/meromerigajusonogew.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/texinaluvitu.pdfIn PDF document text
    • http://dongfangguohua.com/ckfinder/userfiles/files/35117946870.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/fudizumilasagina.pdfIn PDF document text
    • http://fuga-hotel.com/CKEdit/upload/files/xibomikexalinotunevuvip.pdfIn PDF document text
    • https://sanmuabancongty.vn/images/content/files/zazekenebarabotox.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a025510fcda---zarugani.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/ftdnofq7bcobcc4vlk84i15mff/bemorotimisunitex.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/73587917691.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b58f7c4528c---dosipinatidimigizob.pdfIn PDF document text
    • https://digireg.it/upload/5286524113.pdfIn PDF document text
    • http://accronline.com/userfiles/file/54648180487.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/cklr563ndi7gusecv6hp3uilth/39588175698.pdfIn PDF document text
    • http://askort.pl/Upload/file/jaxonulurogusodepiras.pdfIn PDF document text
    • https://longhoang.vn/upload/files/79328293576.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/13649400404.pdfIn PDF document text
    • https://ichibaninfotech.com/ckfinder/userfiles/files/suwosu.pdfIn PDF document text
    • http://pxmonastery.org/CKEdit/upload/files/59531396061.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c50842486---14125459131.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160af3c610a759---41585148710.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+get+free+gems+in+clash+of+clans+without+human+verificationPDF 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_off0000d1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F2 16652 bytes
SHA-256: b496350c7751802b2bb70ca3fddbe1d0871f41143ff313aea219e1d9672ec007
font_02_sfnt_off00011505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11505 11028 bytes
SHA-256: 02968a2089a083e4f5ccfc4112281fae3e84bbe852b7ca1f17cf6b16de4c5cc8

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