Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d56a7ef1720bd3…

MALICIOUS

PDF

84.3 KB Created: 2021-06-27 01:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4aff4e17044ba5784280133776b13fe8 SHA-1: 701875d0c31be2a6bda4beb22f335947d7dded12 SHA-256: f3d56a7ef1720bd3e21a7d4f2d0f4383db12c2f0728a3de1cecb4958e6c1949f
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many hosted on compromised or disposable domains, indicating a link farm designed to direct users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://praguetransfer.com/files/file/bisuwilopasopabex.pdf
    • https://tradingphrases.net/userfiles/files/13818471952.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/8b5c1de95382bc4c9b9b4a359a5b7301/zunadufuwajijomaxuvo.pdf
    • https://stopserv.ru/files/file/93660130187.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b87fe48b0---84248179306.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075c25d0f4af---lisodakezijibop.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/f3b6dc91cd593694bc16c03f469f6c33/71022266362.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160c959d91a3da---43647701375.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/43021710336.pdf
    • http://dalnoboy.org/data/filestorage/upload/files/kibegasik.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837f5626243---fisojinofon.pdf
    • http://bright-inter.com/file_media/file_image/file/livatabivevubuzajupujaden.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c5660e19d83---61176376583.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f43ba5030---1878075249.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/ukvfbh8meu159lrdk3d9nl510m/pawisenoviraxegis.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/c260747708091a6df15972199d791013/20593528871.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/70b36e845101d55231b57e3765c42a8b/bokaxobaxitopezefuga.pdf
    • http://frangarcia.eu/upload/file/92761409933.pdf
    • http://donaldbermanmaimonidesgolf2021.com/clients/0/0d/0d43fbb8ff91cab41fa1b056c0d912a9/File/548731956.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d3535a61fc9---41575812879.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb7cba949e---32668350285.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160bf6739063f9---49337950261.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/5fb5d6c572dc1a0680c028137a4d2a3a/golurodixexuk.pdf
    • https://ceccargiurgiu.ro/userfiles/file/96909390933.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+change+portrait+to+landscape+in+powerpoint
    • 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_off0000e568.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE568 16792 bytes
font_01_sfnt_off0000fd7f.bin
15c9d997c5a7726458bfa38b0296ed1046131a11d80d411f2648106034d14eb4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7F 10872 bytes
font_02_sfnt_off0001165a.bin
4a7745157fbc6bdd9a0808193fb43122bac13d8ad9d0725e868ca9bfeff64850
pdf-font-stream PDF embedded font (sfnt) at offset 0x1165A 17376 bytes