Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00a2e26263405a3…

MALICIOUS

PDF

81.3 KB Created: 2021-09-05 01:36:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c775e0db89cdeed25b5d42a7767730d7 SHA-1: 9b78ab95e64ccf46f6bd9fe008a4ac90ec0ec61f SHA-256: f00a2e26263405a35d09a3c2e6dac07585348c86b79047db1ec244ac8b474093
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links are indicative of a phishing lure or a downloader for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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 http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa31d10ffb4---bonugod.pdf In PDF document text
    • http://ruihuitax.com/files/file/79131821571.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/vedujusaximivudajudotojun.pdfIn PDF document text
    • http://short-story.ru/upload/file/nonebereba.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/kowojovorunized.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/c5cea4f9a1758cc6634e8dd61f356d44/72311348135.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/sojunetigex.pdfIn PDF document text
    • http://huanghels.com/filespath/files/20210825133755.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78033858717.pdfIn PDF document text
    • https://szallas-karpatalja.net/upload/gidutuxifuwiji.pdfIn PDF document text
    • http://canvangdientu.com/images/file/38091397400.pdfIn PDF document text
    • http://xn--spreewaldpension-lbben-9lc.de/meineBilderAlbertGrundschule/file/xoxinodidaburibe.pdfIn PDF document text
    • https://phatgiaolongan.com/upload/ckupload/files/sijurujazinupise.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9a58139a5---pipixosijutumoza.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160adf863b25bd---xozalejo.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612dc1f20ef90---zolojasakenojolovix.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160ede1a47d4fc---68885551708.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f9413ec8d---likikurasumovosu.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/27985411219.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/vj0jvcesv9o0hqpumf9vmm607f/56985129115.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/koxizoruvedamedimusudet.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/pipokiparemesa.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/tegumoponavodufut.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/k14i8e5a2ovq6gk3bsvffhvioa/pavezorawupij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=miko%C5%82ajek+lektura+pdfPDF 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_off0000d80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80F 10604 bytes
SHA-256: 831ae190cbc2ef805db50cc2d77f01eacdd358cfe0df47c74b4fc1a8fb68098f
font_01_sfnt_off0000f067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF067 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10879 18344 bytes
SHA-256: e724e017cbda079b601f93a3c9a8c922d5178e9157de11faaa8c35e5ad9596c0

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