PDF malware analysis — malicious · 6dcfbec275200eea

MALICIOUS

PDF

86.6 KB Created: 2021-07-02 20:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: e71420b7a731ecd14099ac6784e6ae9a SHA-1: 26829c625fb79f353404a60e9ee511a63917fe07 SHA-256: 6dcfbec275200eea4872d29aa53fd15917ecab06e33a923bcee1a869b40a18a4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9922

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://wastran.ru/uplcv?utm_term=formula+of+the+area+of+a+cone PDF link annotation
- https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/d9a847ebd7942c09400adf0e167d7572/58549970662.pdfIn PDF document text
- https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/b3a9c7ef36e7f9d5377c5916e683eb6d/55582406826.pdfIn PDF document text
- http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160beb3a1ca735---selubexumivudozenuzow.pdfIn PDF document text
- https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/scpk16tfs4ot8sh8autcovm8l5/74163191647.pdfIn PDF document text
- https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff93d45e2d---95151785470.pdfIn PDF document text
- https://agentcctv.com/userfiles/file/solilusabetuxeso.pdfIn PDF document text
- https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/c0286e66937a3aa09efbefa7600750c0/sarojogawujizifi.pdfIn PDF document text
- https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/6a53986e7ff298a1b6f187f7f61c7ddf/90899206258.pdfIn PDF document text
- http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/bisekuti.pdfIn PDF document text
- http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e597141783---dupiko.pdfIn PDF document text
- http://atomleasing.ru/media/File/21500955797.pdfIn PDF document text
- http://amexeuro.com/an3_Uploads/file/xurogavisasezoluno.pdfIn PDF document text
- http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/64d94f1b9d8d07a10c2c8bc077738566/vexilekutilopuwesez.pdfIn PDF document text
- http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b576f6c68d2---gexixilupugoru.pdfIn PDF document text
- https://netshopnepal.com/userfiles/file/27290477388.pdfIn PDF document text
- http://allasclub.com/campannas/file/teresimubinobozok.pdfIn PDF document text
- http://kapelski.pl/userfiles/file/9315813473.pdfIn PDF document text
- http://sarlampa.ru/upload_picture/dituwetawajidilujexowoj.pdfIn PDF document text
- http://thetestmag.com/userfiles/files/1670605672.pdfIn PDF document text
- http://ajivikafinance.com/userfiles/file/wunexesuxopepowu.pdfIn PDF document text
- https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/147f19dcc056f34cc0bf318b13c5c6ef/4349086985.pdfIn PDF document text
- http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608459658d786---tojenoravepipodofeseri.pdfIn PDF document text
- http://afghansolar.com/userfiles/file/sodifozofogirik.pdfIn PDF document text
- https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/hv4ni34je0jg8t5gpjhhdv20dm/45299469877.pdfIn PDF document text
- https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806a5ba59b5---fesutukuparixelebokof.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dc22.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC22	16088 bytes
SHA-256: `450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c`
`font_01_sfnt_off0000f153.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF153	16720 bytes
SHA-256: `74413788e1cb71ed4b90a7e36bfa85d13088f4248d2e98c7e854e6026dcf5849`
`font_02_sfnt_off00011d02.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D02	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00013519.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13519	10416 bytes
SHA-256: `9dc6ef58162c143ddca3e3dbda05d4347ea2d902798567bb6aebbe235b849d59`

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