Malicious PDF — malware analysis report

Static analysis result for SHA-256 54560b964caaafd4…

MALICIOUS

PDF

78.6 KB Created: 2021-07-09 23:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: afa03258c9ce515274e89ca48b2d94e5 SHA-1: 8ec0b99735ea78609db54928a4a26db2446185a5 SHA-256: 54560b964caaafd474aabad56785745e13faa936039b26cd7c92f1bfa8f387bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites hosted on potentially compromised CMS platforms. These links are likely intended to facilitate phishing attacks or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a5bf46997---bisedogeku.pdf In PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/4gl5skdbiplpath82jb5kh3763/wedozarepe.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f77f6e074---piwesepex.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/87999348470.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/bopuzo.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/5f7b2g66d2licnl9k4j6sok591/83145935182.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/40105465979.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1ee9b391a---gavawovemokotoxebo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d190c12d29---24509270664.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/kumarem.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021610166597679.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/11762686549.pdfIn PDF document text
    • https://patoman.ro/ckfinder/userfiles/files/lijejagirome.pdfIn PDF document text
    • http://ok-poland.com/userfiles/file/ziguvikume.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/vasisidusoruxosizaz.pdfIn PDF document text
    • https://edinburghpools.com/contents//files/lefuwuveguguriviluvaten.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a5da880f3---jibidu.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/69277205876.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/b22870e4c6857fd82cc252155556e8ea/84910883344.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/5d434f8959a7ae8b207c845ea7fe6a28/86933512506.pdfIn PDF document text
    • https://pisangmanis.com/contents//files/93524800617.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa117259dc---tudowemufav.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/b4f332e6e3e07278a046508953f34e2e/47842671870.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=baby+songs+to+singPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/903b76e60f78ad9c3977136a7aaaa007/jomapenasawukupov.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_off0000d24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24F 16800 bytes
SHA-256: 50fdf896da9e07cee06babaefda1ce63268a756b3cf60068c7205ef1f8398ebd
font_01_sfnt_off0000fdd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F0 10312 bytes
SHA-256: 29efd2a23217c0b6e41ba36786d2fdf4406de03835a242f1b64200743663f017

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