Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca219189c8cce80…

MALICIOUS

PDF

104.1 KB Created: 2021-09-03 14:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 47f7e063590571b405e3f398d801225b SHA-1: bd2d6823e881ca9e6bd70f34bd8d1b8c0b9ac68e SHA-256: 4ca219189c8cce8051643129ad002a5b924c8304204d2a14f5d138cd14aefd9b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and link farm heuristics indicates an attempt to direct users to potentially malicious external content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9867

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://coreaad.com/DreamDataUpload/file/keretenonumitaline.pdf In PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/muguzor.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/24212026038.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/rodafume.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/23921f62670d2453b314d003fcedfc73/petedifamiwatirozowa.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/e3df826629b77530afc42c7d750af754/dirorifubaruzapevipafepe.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/bige3uo225l7bbvamke3sgj8om/62464224534.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/4d1f195143b47621a88bbc02dc5dd61a/dojolazana.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a62d84875a3---79270081541.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/pejatizolizekom.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/8iejrks36mla9r9tfv55kjd5vn/rabemugimatano.pdfIn PDF document text
    • http://www.pilartangguh.com/file/26272075536.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160884dbd4d6b1---bomofilikopijorura.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/desusisufexoridusado.pdfIn PDF document text
    • https://atrax.hr/files/dorafijokopox.pdfIn PDF document text
    • http://woodsfamilypride.org/clients/2/2c/2c83419adcf4927d74d3defe18342386/File/valojimalib.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa0c532997---64732427680.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/2859214666.pdfIn PDF document text
    • https://mimpishio1bet.com/contents/files/mawewikinobaruvu.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/14259854269.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b3eaff22d28---gikigimogufimakofes.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/73810943098.pdfIn PDF document text
    • http://ottomaniantextile.com/userfiles/file/kupekaviwutofer.pdfIn PDF document text
    • https://xn--80aanugxqi.xn--p1ai/admin/ckfinder/userfiles/files/74645409112.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/goxuligaxijokegavubok.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/47418829805.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=maitrise+de+soi+islam+pdfPDF link annotation
    • https://tes-sys.com/uploads/ckfinder/files/20210707/16256045919185.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_off00012d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D23 21308 bytes
SHA-256: 4696f820a4d7d03c4f5392ecda812b1ab3d50a1cce76cf69a68acbdf8ac8dddf
font_01_sfnt_off00016245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16245 10548 bytes
SHA-256: f828353f0b0f9d88dc736521ba9ae730e24187a11c60958fad1c66ca3d66dca1
font_02_sfnt_off00017a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1