Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d905ea708d4149…

MALICIOUS

PDF

80.2 KB Created: 2021-09-03 09:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4bf911f21ba1c719018880842a12af53 SHA-1: e7bab97d30aef623dde1cb3bb296965c0b74097a SHA-256: 30d905ea708d41496cfcf774b5766726114cca1ad9fc01a50f20536792316536
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript and numerous external links, many pointing to PDF files hosted on compromised or disposable domains, suggesting a phishing or malware distribution lure. The presence of a 'download button' heuristic further supports the attack pattern of tricking users into downloading a payload. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cructi.ru/uplcv?utm_term=rpt+pdf+converter+online PDF link annotation
    • http://travelsi.ru/ckfinder/userfiles/files/wazubisaxabeniwurudulas.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/44626980745.pdfIn PDF document text
    • http://abwessex.com/uploads/files/31972940075.pdfIn PDF document text
    • http://goref.ru/files/file/toverawubaguwadakokopiw.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/mowazojajakalemitek.pdfIn PDF document text
    • https://nguoixunghekiev.vn/userfiles/file/50606384131.pdfIn PDF document text
    • http://ammk.sk/userfiles/file/42502641907.pdfIn PDF document text
    • https://kildevangen.dk/files/81894171682.pdfIn PDF document text
    • http://wjcopy.com/upload/files/2519248292.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/pigum.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084d2236bd26---78853796926.pdfIn PDF document text
    • http://allasclub.com/campannas/file/33989558567.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/1e5f86690fb3aaa06232c1aa5791a7a8/pumuburozokekiduwozotul.pdfIn PDF document text
    • http://innotack.com/userfiles/files/relazalajawu.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/wewatekalebigufese.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/fezelixobagurowukigop.pdfIn PDF document text
    • https://kopari.hu/files/file/savumosajelifav.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/82828fd8ca38c83ccc8ca924e1db7781/tojerarozatefogal.pdfIn PDF document text
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/26048228279.pdfIn PDF document text
    • http://e-restauracion.com/app/webroot/files/uploads/files/60560027756.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/63950010960.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/sewikajawobetem.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/c5041d6616e8166267ff693bcec782f8/kawoxutefurinidibeso.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/qj2epj2tjv7oq3smug57dmcnl3/28774145917.pdfIn PDF document text
    • https://coluer.ir/documents/file/zuxogetofuf.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_off0000d64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64D 10392 bytes
SHA-256: 2d820275615b0844a7551a27d73750bbec2637def8cb96381a7ca957029b287a
font_01_sfnt_off0000edeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEB 17896 bytes
SHA-256: 3c3ecf8cdfb22f9547f079c6bf713262b71f5ff058fb6d30942bae7ee4de03fd
font_02_sfnt_off00011b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.