Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae0ec934410dfd4…

MALICIOUS

PDF

70.8 KB Created: 2021-09-27 08:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c5b72ba2c17040884c3ab416be731406 SHA-1: 03621fd7e2dd2cd023fb04458b55d2cbf26b48b8 SHA-256: 7ae0ec934410dfd4390bcf3269eae549aefd9c60de3a2ceba7c3def6348d4704
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which are part of a link farm hosted on disposable or compromised domains. The presence of embedded JavaScript suggests an attempt to execute malicious code, likely to facilitate further exploitation or download of additional payloads. The link farm structure, combined with the ClamAV detection as 'Pdf.Phishing.Trojan', strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/uplcv?utm_term=ios+apk+download+for+android PDF link annotation
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/8517416424.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/bezeluxeput.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/gezog.pdfIn PDF document text
    • http://nuovojob.com/userfiles/files/75586247693.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/lomovizexox.pdfIn PDF document text
    • https://okazionche.com/files/vobizakosusolu.pdfIn PDF document text
    • http://chrisdepanneservices.com/Sites/cds/files/pubugodobonad.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/kabafudomosisapuvedazu.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/b6c5c9811266e0df0af1abf4f63fbcd3/roligupomem.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144ae07ae2b9---35694122144.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/0f2a6d4649bf9348af9f13990fcd1907/zegezewogigutuvugisew.pdfIn PDF document text
    • https://christianschoch.ch/userfiles/file/posusisupok.pdfIn PDF document text
    • https://lenaoyunlar.net/calisma2/files/uploads/3855166030.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/55b55e11ff7d6047bb3582e772365202/43918174388.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/56503693985.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/e7f333c0a654131e24040cbe11e246ba/kaxorovu.pdfIn PDF document text
    • http://langmoon.jp/js/upload/files/68806752256.pdfIn PDF document text
    • https://www.lipca.com/ckfinder/userfiles/files/butunafu.pdfIn PDF document text
    • http://mycoapaisyl.com/webimages/files/86365894164.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6983ebb48---94327393114.pdfIn PDF document text
    • https://mtydizayn.com/userfiles/file/xusuwizoguwazixuseju.pdfIn PDF document text
    • http://stylekd.ru/files/46823466892.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_off0000b1a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B8 17420 bytes
SHA-256: 864a8d623e14180f4f368ecee7114e015c92792e50f3bda26288be903a81daa8
font_02_sfnt_off0000f619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF619 10388 bytes
SHA-256: 9092d2b916be799f2d8695995fc48aff8a405619687f402c4e33bead7b42f98f

Open this report in the interactive analyzer, or submit your own file for analysis.