Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f9e0ba131d5988…

MALICIOUS

PDF

78.2 KB Created: 2021-09-13 09:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b5d4a128e14a54146a54fbf117dccc4c SHA-1: b3d135214bc7dd97b85afc500c6470801fb3b24b SHA-256: c1f9e0ba131d5988fa47acd857e1a2c787fbd0d21013d5911c7333651d223ae4
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://t-eamplus.de/web/editor/files/lazodad.pdf In PDF document text
    • http://mobilni-kadernictvi.cz/files/file/pidapudevumapumubagizut.pdfIn PDF document text
    • http://www.tempshift.com/app/webroot/files/uploadimagesfile/63018595612.pdfIn PDF document text
    • https://kaimano.it/file/44236331313.pdfIn PDF document text
    • http://palletgoanloi.com/img-dn/files/35722641264.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/muvogopinitevezuzoxivug.pdfIn PDF document text
    • http://cdkuys.handysociality.com/upload/files/jowafutabusijoxefeb.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/988308b7553b7db1b4ade2753f55327e/32384422375.pdfIn PDF document text
    • http://orthopediedelft.eu/files/wumasufekabavupax.pdfIn PDF document text
    • http://theeultimatenetworker.com/ckfinder/userfiles/files/jujisopifa.pdfIn PDF document text
    • https://tyko.pl/userfiles/file/78675824299.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/95918575431.pdfIn PDF document text
    • http://cleversystems.ru/userfiles/file/rojepudo.pdfIn PDF document text
    • http://ebrinteractive.com/userfiles/file/48789482799.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/083c5456492c546e04de8b4953aa88ea/68141636005.pdfIn PDF document text
    • https://almuhja.ps/ckfinder/userfiles/files/15876872535.pdfIn PDF document text
    • https://pindimana.in/uploads/file/47043095368.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134db8be2f4b---nanuzimifuribewekovamo.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/dunoxotepuzironosejuba.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/metagifogasesidonu.pdfIn PDF document text
    • https://nieruchomosciturystyczne.eu/files/file/46998407800.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210913_A74B6D15519B4628.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/202194949556547.pdfIn PDF document text
    • http://fujieshubao.com/zk/UploadFile/file/2021091303002773499.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/monejarageronarojoj.pdfIn PDF document text
    • http://9jamail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/56866777413.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=best+site+to+download+torrented+moviesPDF 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_off0000cf7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7A 16812 bytes
SHA-256: ab87cb0ad8d72848e81941be791e0304a9e4b67409a911fd2f423914d7243867
font_01_sfnt_off0000fa9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9D 10616 bytes
SHA-256: 1348450f3080689e17ea8fb82b58a402b558b773610357c0660101ee63077aa5
font_02_sfnt_off000112fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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