Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e7b8da8a26646c…

MALICIOUS

PDF

84.4 KB Created: 2021-08-19 04:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5cf735a1a7d5c946686b0e45f6db50b2 SHA-1: ea145e49d00f0600e4f61b58146464f33586502b SHA-256: 07e7b8da8a26646cc7f5bb950174d05a3ea7c89bce2377efa7e640219ed3c736
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608807516a787---tinurisenabigedevaj.pdf In PDF document text
    • https://gilbertems.com/videos/file/lesaxo.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2cdf29bf4---nadativodumimipumijedog.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/ajfbdveor2284j76vko71rqiid/58761782978.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/85446193556.pdfIn PDF document text
    • http://bon-mar.com/fck_user_files/file/merag.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/665b2cdec070942f2a4d92d53f008451/dafetamulenuz.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///getutudiv.pdfIn PDF document text
    • https://ksmt.edu.np/assets/ckfinder/userfiles/files/85742945226.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d48d256c30b---22022822542.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160783183f3983---31871014852.pdfIn PDF document text
    • http://www.celso.org/download/12060169981.pdfIn PDF document text
    • http://portableandcool.com/files/files/wajapelonekowekibanabis.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/posikebuj.pdfIn PDF document text
    • http://assistance.uz/images/shared/file/zumelobofa.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/cb49a26c0caaa26c0c16105d4b07bd1e/12799784335.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d6862d4bde9---dojuxeju.pdfIn PDF document text
    • http://waltwhitmanhsclassof1970.com/clients/3/38/385e9ad2c098ba3bcab8db81b262ab1e/File/4346498116.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/nubamotuv.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/56721971681.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/radiresikalimixute.pdfIn PDF document text
    • https://marblobathware.com/app/webroot/img/files/32402957662.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/mixuvipisajidamibax.pdfIn PDF document text
    • http://4bx.pl/public/file/45065504289.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609c95afc56e9---10159581836.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=honda+powerboss+7000+generator+manualPDF 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_off0000e463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE463 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC75 17356 bytes
SHA-256: 3b589c55c9230717b65892bb773c6bb1ddf36f0a8d5ce4b74f7ae552515209ba
font_02_sfnt_off00012a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0B 11132 bytes
SHA-256: a41f182224bec79c20e15a7835e2b79ebc0d820662469f0a23381d17dbfbfcbc