Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ad697f1e49723c…

MALICIOUS

PDF

91.6 KB Created: 2021-08-05 00:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1ade04718f6591932406dfb8d4135d7d SHA-1: 4812143e403bdc1ae7422ec31428292a6040bf46 SHA-256: 05ad697f1e49723ccc3051b87350fe12c2ee2e59f63e8cad117762c58930d4c6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites used for hosting PDF files. This suggests the PDF is designed to lure users to these sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8c97bbb99---balis.pdf In PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/563a78970c946b998712b81115cfae05/50326854356.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/biral.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bddfad5f1---veset.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/wusiropukixepolagovuziras.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfb66992be---zofusogitag.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/wekesumix.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202106031449112447.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7342a44d63---vufirejudezuxofogepafo.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/60011655178.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/866i2boed127kati5kgolhvmvp/85619828060.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/xejuvefumikaxemezas.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160964fcab27e4---tejema.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724eb623cd4---32601188315.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/n43423q93dekfccromiu2csoir/lamugelilogibisufowibiv.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/73724472094.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab09652856b---rorelegun.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/fijufororigelu.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/0854d75cfbbfd3db7722b8373ae97d6d/nexesederuvifawe.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/52581922459.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/e8glcj6ts25rnrtnpnmdb34kbb/wokimejopokaze.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/47cebb6f164e18d9fc5aa4b19adf43c6/10825283805.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/144ad52a435c11b81a5cb9b389c90d00/misijilazazetewikukujafa.pdfIn PDF document text
    • https://linlinline.biz/js/ckfinder/userfiles/files/64496012245.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=what+is+the+message+of+the+movie+persepolisPDF 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_off0000ff4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4A 18028 bytes
SHA-256: 0229060ece66101bfc905b3cc18d49d894e1143770adff342329b58fd2339fce
font_01_sfnt_off00012d19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D19 10760 bytes
SHA-256: 752b145250f30b96d1f158017ee9c96c771ccb24bbc943c9db3448896cbc1ac9
font_02_sfnt_off000145e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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