PDF malware analysis — malicious · c8780ee1a96c1686

MALICIOUS

PDF

72.8 KB Created: 2021-09-04 23:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: b430cf2b15506637bfedc18506da9c4c SHA-1: 9eefd434b6f69e21c3996c40e1f071f9c43dfb68 SHA-256: c8780ee1a96c1686245e758f2320c72db6b33187534e8a278b831ed4fc3736e7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution attempt. The embedded URLs, such as 'https://wastran.ru/uplcv?utm_term=marine+corps+birthday+message+2019+pdf', are likely used to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9965

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://wastran.ru/uplcv?utm_term=marine+corps+birthday+message+2019+pdf PDF link annotation
- http://www.zywawiara.pl/pliki/torapotigiludofogez.pdfIn PDF document text
- http://sosnovgeo.ru/userfiles/file/pinekusurezagifo.pdfIn PDF document text
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612edfdc61255---nupedolovipugatodirifo.pdfIn PDF document text
- https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/k47nvnh91adecqgbfhdv6h4h0p/tugudovasilenugizizupofa.pdfIn PDF document text
- http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16099e901648e1---2044380934.pdfIn PDF document text
- https://alyosserspneed.com/userfiles/files/65652274631.pdfIn PDF document text
- https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2d4f3cb32---78410311137.pdfIn PDF document text
- https://accuratesearch.com/userfiles/file/69510546654.pdfIn PDF document text
- https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/a65edc1ad97c5bf1624b2d53d70aa546/kavapixofumenawawonu.pdfIn PDF document text
- http://tai-yang.tw/taiyang/upload/file/16996993553.pdfIn PDF document text
- http://tdvvietnam.vn/webroot/img/files/zanadatisoxu.pdfIn PDF document text
- https://alamansyria.com/userfiles/file/padevajapesixe.pdfIn PDF document text
- http://teaandtiarasottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/senadokuroke.pdfIn PDF document text
- http://dermatologomiguelgallego.com/miguel/fck/file/21234358017.pdfIn PDF document text
- http://odontoflash.eu/userfiles/files/dotugof.pdfIn PDF document text
- https://anna-bel.com/app/webroot/files/userfiles/files/werulazisokoposofe.pdfIn PDF document text
- http://aostavet.it/userfiles/files/fufebupiwepopezagidegir.pdfIn PDF document text
- http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jozesazeripepiz.pdfIn PDF document text
- http://mp-journal.com/media/file/batide.pdfIn PDF document text
- https://bistakalikotenetwork.com/userfiles/file/wuvudibixum.pdfIn PDF document text
- http://chikatere.com/Upload/files/zaxisugadez.pdfIn PDF document text
- http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160733f9125a51---fewumaxixafazifokulifis.pdfIn PDF document text
- http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/c6cfe869fa13991fce2323b99cc92fe4/merazosoxujumuj.pdfIn PDF document text
- http://alnadaoil.com/userfiles/file/lusofipexigebuniloparav.pdfIn PDF document text
- https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/hknstpc1a8l5sjc2ua03nd4fin/84532735859.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b61c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB61C	11732 bytes
SHA-256: `2ba399204bd90f907756a9c97ec9f2b74c64187cf24c93e87d4af6851a9de776`
`font_01_sfnt_off0000d194.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD194	17936 bytes
SHA-256: `7653b4d4560395e8ec6f68b100e8db052e527385c1b4c8987d81fc0ab2219ff3`
`font_02_sfnt_off0000fd92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD92	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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