Malicious PDF — malware analysis report

Static analysis result for SHA-256 699a2cb7b719d857…

MALICIOUS

PDF

74.2 KB Created: 2021-09-18 06:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 939a8da3182e7a846ca5da0202199b40 SHA-1: 4d93fb75132ab2b694232ebe8bc34ebaf019f454 SHA-256: 699a2cb7b719d857da585129e1f8656a3314405aa608eaaac094199b5c96ad0b
156 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to multiple compromised websites, indicating an attempt to direct users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The document body was unreadable, but the heuristics and URLs clearly show a pattern of hosting malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://daonshop.com/files/fckeditor/file/31878508293.pdf In PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/466bc78011e00d161af76e200f616006/65104024077.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8ce7708fe---84561884224.pdfIn PDF document text
    • http://precisionsurgicalworks.com/alpha/ckfinder/userfiles/files/bupokalidizipi.pdfIn PDF document text
    • http://only-svet.ru/upload/files/16881901618.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/sixerifuduvezisodojoni.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/vezedorejajuvamuno.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/bazikowotu.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161384e7373f11---tuguxesejubuvuxugemiwuzu.pdfIn PDF document text
    • https://lighthousemacau.com/html_upload/file/86999671958.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/kakugosusa.pdfIn PDF document text
    • http://mascotdd.com/file_media/file_image/file/sezejilekagadorekatinej.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/19508945660.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613990e1638cb---levori.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613454af27424---14683644179.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/36609175568.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/jasolonenuxopagani.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137cab7d8fba---19220018214.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130645eb6779---37902091564.pdfIn PDF document text
    • http://xn--9i1b14lwsg1seumdzsx.com/upload/fckeditor/file/farakakifeluzen.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/fagikopigu.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/372a4300763a75d49b429bd347f6cdd6/98801460418.pdfIn PDF document text
    • https://southernwashpros.com/nbloom/fckuploads/file/62755707986.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/16349799604.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=putlocker+ride+alongPDF 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_off0000c1e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F5 16036 bytes
SHA-256: b7a3752ac8a1f0e08ca2bbe16434f15881e0277619a7e19464d3e945d068bc81
font_02_sfnt_off00010341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10341 10572 bytes
SHA-256: 7796d2ab9c30e5734ce10ee3cb64483e3c444b3d04c04b0f91c351ba5c6e87d6