Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5380f10e03a0f11…

MALICIOUS

PDF

97.6 KB Created: 2021-08-02 19:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: cee5c837605fbd7754fd07c32e954a1e SHA-1: 95f5723fec22490a977154ba28f3e7a6304982cf SHA-256: e5380f10e03a0f1110b3eb26619fec50a0fc179e852533cdf54321bd802f6c30
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these links. The document body is heavily obfuscated and does not provide direct clues to the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://am-assets.com/aom/magnolia/userfiles/file/38452665717.pdf In PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/fea1339424b622fe7efc545ae961b01f/96012114112.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210702_BD30AA119C4B0C6D.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/zogerudojakadoluluwipak.pdfIn PDF document text
    • http://pvvc.cz/files/zepuvubumag.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/46069499693.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/foxujofeworad.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/bqa2kpuh2ivft9a6gfa24esgd2/3470468723.pdfIn PDF document text
    • http://sodrex.pl/userfiles/file/lebuduxumumavijilali.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/ouiso6npnvvk8krmmp3vmdd013/tawurugidovilinixo.pdfIn PDF document text
    • http://geose.ru/userfiles/file/55668726776.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/80372217421.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/10pti53qbl2lscc3i8hl2po581/likelekuvip.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160f5b5608aec9---gutumurobadi.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/mheahn0u3llu8jpstpu28eoc77/kofazuvofakubani.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/4099855130.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/78ijcprkcrs1e0lctgv1opn9sp/linaj.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/f1115ab1f04563741832359159ff8948/lojamavitewitizizeze.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864ea3ca9de---dufam.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d2b005ce2---8384250970.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/f9e4055bb5a52e43d94546bfd2d60808/niredazigesexixafilujizo.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/9337598664.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/29597925503.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=why+google+pay+is+not+working+todayPDF 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_off0001193d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1193D 17424 bytes
SHA-256: 9ac9773aaa4109dc7982715fec6ad27e17dd8d69edb7d1d393b8819eaa899228
font_01_sfnt_off0001472d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1472D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F44 10956 bytes
SHA-256: 3092667d93eda25270e7e49a1dcb0c3678591fd1789e24e510e3407450e710b1