Malicious PDF — malware analysis report

Static analysis result for SHA-256 349d27983c43654d…

MALICIOUS

PDF

83.3 KB Created: 2021-09-01 15:36:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7cbecddc5163fb65dab71c75021c51ca SHA-1: eecba178150e098f7cef675b34e7cb9bb23e5fdf SHA-256: 349d27983c43654d84727d8d8585903c78657cb77a03def1d60a75a1bb303017
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a malicious intent to distribute further content. The ML classifier and ClamAV detection strongly support this assessment, flagging the file as malicious and a phishing trojan. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded URLs.

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 http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wiwikasav.pdf
    • https://zanhotel.ro/beficientconsultingFiles/file/62406898530.pdf
    • https://tiklatakip.com/calisma2/files/uploads/pofokokabijejunarize.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/67a998a7519c781cacb7d3e6758e575a/56551095631.pdf
    • http://guitarenko.fr/img/files/livetifizomesapixexevevop.pdf
    • https://burgas-remonti.com/userfiles/file/23679894740.pdf
    • http://astmasme.com/userData/board/file/kurupekaxenosapuravaw.pdf
    • http://crystalsteakandstogie.com/clients/1/1d/1dbb6d5698303b6304ae84622e226a19/File/somaguduja.pdf
    • https://dialogueinpraxis.net/files/docs/tebod.pdf
    • http://janaturismointegrato.com/uploads/file/64860482129.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd908edca73---xomubalajokinefa.pdf
    • http://beulahcooleycollection.com/clients/870349/File/87371566498.pdf
    • http://pelejas.com/IMAGENS/CKFINDER/files/tozuxodoli.pdf
    • http://tobn56.com/UpFiles/file/zuxidob.pdf
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/126f281743c0e8ec875f0b56684234f9/zunefulogu.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/91er6ehbtdaf2hlmadpfh6d9gm/vavolivatawawevegazunuv.pdf
    • http://beachfirebrands.com/userfiles/file/24853866460.pdf
    • https://hitourkorea.com/FileData/ckfinder/files/20210624_3B8BCFC2EC2B9632.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/7efduc8kj6hck7lnrq7dktnj35/18808544920.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088a159a2626---48799390431.pdf
    • http://bygreenpure.com/userfiles/file/wiseg.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160722a7789a1b---80251952633.pdf
    • https://tennis94.fr/img/pics/files/lewasilivupidivawutajebom.pdf
    • https://editions-tlp.fr/ckfinder/userfiles/files/11171630178.pdf
    • https://aartipalette.com/userfiles/file/pizijevenofavilusofebu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=gui+prototyping+tool
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e32b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE32B 16792 bytes
font_01_sfnt_off0000fb42.bin
af0d221d75dcaf0abdaf830ed2ade8044891e9bd315d769b6bcb0c04bb485d1b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB42 10216 bytes
font_02_sfnt_off00011247.bin
f898f37482ff015597c2938fc1c4871c977eaa53d13dd378e6f8eae4b6aea5c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11247 17384 bytes