Malicious PDF — malware analysis report

Static analysis result for SHA-256 427aa91612940ae1…

MALICIOUS

PDF

91.8 KB Created: 2021-06-30 07:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9e41f74312585da21db4b1af1af145c8 SHA-1: 104c250fc06a45debf6b0821bd52db236dd3f179 SHA-256: 427aa91612940ae10e1221c07f473695859a4b29eca810d94e9d0dd465f4409b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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 https://nomylo.ru/uplcv?utm_term=animal+crossing+new+leaf+gracie+guide PDF link annotation
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/613471cb5e16d764411164dfcc6a5456/ragivavanasififo.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/26dpi1s5s7r7sc5u8lgjrt5rpj/fodafewidepajozegosorimil.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/b6397dc4062feb566aaa063807273e8c/wokaxag.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d39df859b5---xugadifore.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc928e3b27---94176316678.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/4311235326.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609225d9898c0---32881215033.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/rolarenanajevuvi.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/wunowuli.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/90jqidk36imjkdpfqd1jua2uph/vetel.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/wovuv.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c59ba4928a1---zororiz.pdfIn PDF document text
    • http://abwva.com/uploads/files/74614831274.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16080412a4f12c---ruwinukufonetiwubafebepox.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b8add099b---3429460233.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/uso7hhdh03t2enhscjdi874fev/tanasozisegunuvijo.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16098c435360e4---19384464491.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e12a8b479---bubanukorapuso.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/kimafigusuzurilokegivis.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b4605c6032d---99186192666.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606dd40c024eb---6609038809.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/zumojarudil.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/c2b3b7a9d2c7f8f294e7802f2e11b82e/55524326514.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76F 3844 bytes
SHA-256: a5eec9b27daec42d22444b3f7b8d0f32e4170403abf77dcdcf1cfd4de9e25679
font_01_sfnt_off0001064b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064B 10888 bytes
SHA-256: e3ac26e170bfd3a830e5a1f5bba6e570645bafbe59d017d3949744cc2b9dcc11
font_02_sfnt_off00011f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F56 16184 bytes
SHA-256: 6ce29c8f44ebda01f273350067673b0d362c9711fe00f7ad0071b7e8c584959c
font_03_sfnt_off00014949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14949 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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