Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ce2e11758fcb8c…

MALICIOUS

PDF

69.9 KB Created: 2021-09-05 09:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e380319dfa34df4d406aedd144a12215 SHA-1: cb500bddf91073e7bf5dfb5712b4d7a1c113eae7 SHA-256: 15ce2e11758fcb8cbee067188f73bc5a0d0df5ae4e20c7b29f2a3ddfd1ffa94c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. It contains a link farm directing to numerous external URLs, many hosted on compromised WordPress sites or disposable domains. The presence of these links suggests an attempt to lure users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/44471824396.pdf In PDF document text
    • http://spy-military-labs.com/userfiles/file/56543636263.pdfIn PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/40579221652.pdfIn PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/64849633127.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160924a59bae91---bowub.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/beluletavakonug.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/bd66ae00861a2e1938e090bda113f5a2/fabarikekegezemik.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/tikubepodogoxesigaxito.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/6321888913.pdfIn PDF document text
    • http://studiosantese.eu/userfiles/files/titopofamuzivexizexo.pdfIn PDF document text
    • https://shibbirs.com/media/files/77433044845.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/19789540309.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093cde98496a---zevulasijulegevuberetowa.pdfIn PDF document text
    • https://mkycc4.com/kycc4.com/userfiles/files/10224708710.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/78430404988.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4334b17e41---pufamojuvovirekol.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/d5947ee7a1709703684c938720a2c1c1/95259945513.pdfIn PDF document text
    • http://wingmanplanningdemo.com/userfiles/files/jeledelawusav.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/l998ak55uklnc0ib12ld8g5ckc/tutole.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/96956050054.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/e97b2eb80a53f107c6680220429c21cf/bavadopozufuwabisa.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/51820596609.pdfIn PDF document text
    • http://redskap.ru/userfiles/file/5381600287.pdfIn PDF document text
    • http://citescolairedeledit.com/include/file/nemiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=leader+summaries+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_off0000b1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E8 16232 bytes
SHA-256: b34491adacf4f65c1e3c1a9e3237e7387f0e303027a0f6605601eaa896264b97
font_02_sfnt_off0000f318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF318 10348 bytes
SHA-256: 1bd28517a74aaab142632456f9d339ca35bc5ee70abd42cafafb33896fa842eb