Malicious PDF — malware analysis report

Static analysis result for SHA-256 65bab5388b7bcb3e…

MALICIOUS

PDF

78.5 KB Created: 2021-09-05 23:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4d7806d2d401051a86f4cecfe3e47c9a SHA-1: 18454c75b400fb19c54096b44819b222633bb69a SHA-256: 65bab5388b7bcb3eab751bc7a4188547acf240f81b50e1d9828de3d4009a848f
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 domains that appear to be compromised or disposable, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/6943950570.pdf In PDF document text
    • http://studio-rivetti.it/userfiles/files/riromudorolezikukarakago.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf79e7dac0---tapafubodimag.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/sne2pct23if40u24ifojujt55g/64513641486.pdfIn PDF document text
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/luginupugavidarokev.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/kogapivawumakurusajawosur.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edfe50e3d39---17086830234.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/suvij.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/98587848155.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/zuzodebidodalimupiwu.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baae392ac85---lakodoboxunokolijug.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/35351203965.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/5gpjamtshbj8qj6dh4dmrkkl37/70653062356.pdfIn PDF document text
    • http://fondationmonetoile.org/clients/0/0e/0ecfe6182781ff486fe5156d2e85c11d/File/85271619187.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083280b5dc13---60058765614.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/zunenasabipuzukazatixa.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/fne8qj06t6a988d5icdtularq9/tinomefujem.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/aab6f8cb2d578674eee93a74e8d7301f/4441836526.pdfIn PDF document text
    • http://htwy.com/upload/file/71023165253.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b82a846ef36---40108301377.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e3070fa5c9a---49252970741.pdfIn PDF document text
    • https://ibextrail.com/editor-images/53783465827.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/vabix.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/notavuwuxege.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83de6b512---43678886469.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=present+continuous+tense+exercises+fill+in+the+blanks+pdfPDF 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_off0000cc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC23 17952 bytes
SHA-256: 73b13bbb83823a1e86610738cdffe59152ac522d347dfb23b2ecda7b5c502820
font_01_sfnt_off0000fa01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA01 11152 bytes
SHA-256: f77b162f0b775200d6535ed905c15f6c919cf251693a6bcc0db0b17370e2fcec
font_02_sfnt_off000113d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1