Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3ed7fc759e00cb…

MALICIOUS

PDF

80.8 KB Created: 2021-09-14 10:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4e507924fbb04e304bd91e3caac3c5dd SHA-1: d892a0b86ec4e375e810175b26ad3f18660e3215 SHA-256: 0d3ed7fc759e00cb822eb3899da347e9a33e4194a6e7e59242ed6600034ff246
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that form a link farm, a common tactic for phishing or distributing malware. Heuristics indicate these links point to compromised CMS uploads and disposable hosting, suggesting a malicious intent to obscure the true destination. The ML classifier and ClamAV detection strongly indicate this PDF is malicious, likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://philabc.ru/uplcv?utm_term=manikarnika+full+movie+online+free PDF link annotation
    • http://synerfreight.com/syner_upload/images/files/95887878801.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/28952aa1a2403d0f2c7af9bb393b0a96/gibewu.pdfIn PDF document text
    • http://vsrru.ru/userfiles/file/9543586649.pdfIn PDF document text
    • https://associazionemusicaviva.it/uploads/file/nigima.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/74603023526.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/pelaxusagadosugugiwuwuxuj.pdfIn PDF document text
    • http://dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/moliwujofevopumerixura.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/85319746364.pdfIn PDF document text
    • http://vertex-decor.com/userfiles/file/nixaxekoveba.pdfIn PDF document text
    • https://windfreeklima.com/upload/ckfinder/files/15842283707.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/44398529987.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/25726815232.pdfIn PDF document text
    • http://mwbright.com/upload_fck/file/2021-9-7/20210907130938500231.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/xupujebezafakabexegekubek.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/mujibeja.pdfIn PDF document text
    • http://wahluenfty.com/userfiles/simuseno.pdfIn PDF document text
    • http://danies.ru/ckfinder/userfiles/files/jakesaziwadazu.pdfIn PDF document text
    • http://montoaneli.com/ckfinder/files/woriva.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/32991912275.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1613f81de91fb8---zajeguwowifesejilatabega.pdfIn PDF document text
    • http://dogalakustik.com/depo/sayfaresim/file/nobijug.pdfIn PDF document text
    • https://rintrans.com/files/48614471854.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134e126c0046---52203136292.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210909_53F5C08BC86AC1AE.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_off0000d9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E2 17300 bytes
SHA-256: 5f30750209b3c322c795924b3e280e7670c3330ca550c4cf613a5a1b46ad7a8a
font_02_sfnt_off00011e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E32 10360 bytes
SHA-256: dec11dcd4e198ef3d7a82f07771dabed727bba2f574519ed6c2fa9cde0d77564