Malicious PDF — malware analysis report

Static analysis result for SHA-256 354f348d8c0e3e4e…

MALICIOUS

PDF

93.0 KB Created: 2021-08-02 11:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: cd6375cfd5b4855bbdfead0c6cf9ab96 SHA-1: 01ab2b402d224e0adff7d09871a63e7fc69ece51 SHA-256: 354f348d8c0e3e4e66cf543f220bc7311e1410e7dc65fa9fae46be2db5188cc3
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to websites hosted on compromised CMS platforms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://superfishinglewood.com/uploads/files/42564621514.pdf In PDF document text
    • http://eraldocomo.it/userfiles/files/beroxivurusizaxa.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/xeviwugazar.pdfIn PDF document text
    • https://mimpishiosatu.com/contents//files/diwerabixilinokilebod.pdfIn PDF document text
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/79218231acfd51d80e94896a9b48f358/30249223085.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/28078652753.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/72228910090.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c10c45244---45287546815.pdfIn PDF document text
    • http://benrassam.com/uploads/files/nawonanatozoriwijefa.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/9ea3f11b53e76118ad8bf963e449f819/limutidodifamufebugoduse.pdfIn PDF document text
    • https://vieclamxaydung24h.com/upload/files/gokinapiluvudaberodinese.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/dexajinulavajejukomatal.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/betesa.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160800fd38fdae---tefanivag.pdfIn PDF document text
    • http://kryotherapie.net/neu/userfiles/file/gefotegoxurawekolamubiv.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/49132cd053e7c749b003b9886fdd3efe/dibudojunofok.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b610774479---88564007189.pdfIn PDF document text
    • http://poolprotektor.com/userfiles/file/51273164432.pdfIn PDF document text
    • https://latework.cz/soubory/58691851500.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d875f8794f---27662859448.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/4ef5644e9233f310aa220cb9cae8b5b8/nepivipobuju.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/59595294952.pdfIn PDF document text
    • http://czapla-dachy.pl/public/images/fck/file/47105557505.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/65334516343.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=vax+platinum+power+max+carpet+cleaner+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_off00010588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10588 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9F 10624 bytes
SHA-256: db0942989f6b259228cb86b624868ef4bdf1e95aaea7bbea9ece101742be2a50
font_02_sfnt_off000135f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135F0 18628 bytes
SHA-256: daf5fd021e08440c76f05cfd4abd2fbef7437217a7789ef939fc039aee72eb88