Malicious PDF — malware analysis report

Static analysis result for SHA-256 64c2f7e6d03e8fcc…

MALICIOUS

PDF

82.5 KB Created: 2021-09-12 11:34:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 31d6498645af3c70a554368d2b727fa8 SHA-1: 70a54797272e7188d324ea9e2b8b2c3c1a14c8f1 SHA-256: 64c2f7e6d03e8fcc2357a916e5def95e6c17f9336497561f7be07c2b2d114692
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to various external URLs, some hosted on compromised CMS uploads. The primary purpose appears to be directing users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=how+to+update+my+phone+to+4g PDF link annotation
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16133eadde4662---wofezotawemizanojerofi.pdfIn PDF document text
    • http://fabrikando.com/cmsimple/images/file/43721996315.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/dofokidojetixik.pdfIn PDF document text
    • https://xn--lenachatka-57b.pl/uploaded/file/48831863133.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/73646321941.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210903185453813.pdfIn PDF document text
    • http://kcde.kr/userfiles/file/84231953818.pdfIn PDF document text
    • https://mtydizayn.com/userfiles/file/dibagakefasizilebuxepa.pdfIn PDF document text
    • http://erex.hu/upload/file/xesejenen.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a890f595dc---nasosoninomodup.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613067e6626eb---fifij.pdfIn PDF document text
    • http://skupka23.ru/upload/m/wapadelamunamifitinem.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161380e51d0be2---32684172274.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c4b754897---fodalosixo.pdfIn PDF document text
    • https://migger.dk/userimages/file/3227319558.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/suzirapejapejilasano.pdfIn PDF document text
    • http://xn--h49al71atridzo.com/userData/board/file/47178842401.pdfIn PDF document text
    • http://www.xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/mukon.pdfIn PDF document text
    • http://kryotherapie.net/neu/userfiles/file/jadunivewokoxu.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16139e6716a77f---29869904214.pdfIn PDF document text
    • https://atlas-consulting.ro/fckeditor/fisiere/file/popegogik.pdfIn PDF document text
    • http://aloisiquadri.it/userfiles/files/loloxobojuko.pdfIn PDF document text
    • http://roleco.pl/data/aktualnosci_imgs/file/56836145205.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/45188966393.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1630905805.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_off0000daa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA6 10800 bytes
SHA-256: adc69890f347cfe17f4dceb68c206dbc7d02b30e316911522bb3ca32257cbf27
font_01_sfnt_off0000f339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF339 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4B 18652 bytes
SHA-256: 01422d5d293b4104755c1b603cda8352b5425ead8ce2597e949316477257e9e6

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