PDF malware analysis — malicious · 2e13c7864b5fff83

MALICIOUS

PDF

72.1 KB Created: 2021-09-22 20:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: f5b208e7f22b116ed4dac03d08ffc085 SHA-1: 4b98ceb751c9eaa70dc86554c29068018cb398e2 SHA-256: 2e13c7864b5fff834ff73b71e86e5ddf082400b7c11288927e38fbc66cb732c8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised websites and disposable hosting, indicative of a link farm designed to distribute malicious content. Heuristics indicate the PDF is a link farm and has been flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. While no scripts were extracted, the structure and URL patterns strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://pistant.ru/uplcv?utm_term=pagination+listview+android PDF link annotation
- http://codienlanhtrangia.com/Images_upload/files/liwoj.pdfIn PDF document text
- https://debo-fit.be/userfiles/file///60755037669.pdfIn PDF document text
- http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nukubopukenepekunefiba.pdfIn PDF document text
- https://cordovajewelry.com/images/file/13733645762.pdfIn PDF document text
- https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/91748720004.pdfIn PDF document text
- http://kyochonbuenapark.iorderfoods.com/uploads/files/931676194.pdfIn PDF document text
- http://elementsgogreen.com/userfiles/file/pinaseligaduragetoduz.pdfIn PDF document text
- http://efuturesthai.com/uploads/file/tomupenaraxarewuxar.pdfIn PDF document text
- http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614695f0d5532---6787333078.pdfIn PDF document text
- http://hrudolf.com/userfiles/bofaveleraruz.pdfIn PDF document text
- http://nattuvaartha.com/assets/ckfinder/core/connector/php/uploads/files/rigopiwazojel.pdfIn PDF document text
- http://elateridae.com/images/FCKeditor/file/55069756283.pdfIn PDF document text
- http://www.slenderclub.cz/ckfinder/userfiles/files/sorufatonemufapuguzuda.pdfIn PDF document text
- https://www.auto-ecole-acm.com/ckfinder/userfiles/files/xuditagipakifu.pdfIn PDF document text
- http://dd-eng.com/files/files/nekefulelawuvilev.pdfIn PDF document text
- https://nepalihemp.com/ckfinder/userfiles/files/94493349023.pdfIn PDF document text
- http://rosabaum.de/web/editor/files/7337559607.pdfIn PDF document text
- https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d01fdad4d2---44376616365.pdfIn PDF document text
- http://kayapalinakliyat.net/file/10027297760.pdfIn PDF document text
- http://sov.tranovice.org/webpagebuilder/ckfinder/userfiles/files/89268034353.pdfIn PDF document text
- https://lrsdev.com/userfiles/file/78033813765.pdfIn PDF document text
- https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/161423131191c5---pebipa.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16146e48fd0476---6861214102.pdfIn PDF document text
- http://tid.vn/upload/files/87655198486.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_off0000b8fa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB8FA	16048 bytes
SHA-256: `01a7f219f7f04293402aaa930ca5424bec3ff838f0ad9277f25b3d8b77d70d08`
`font_01_sfnt_off0000e2ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2CA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000fae1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAE1	10576 bytes
SHA-256: `7c5bd6a418c61451e3b61dfcdee91d15b79423f709eee6dd3e725d669d14fb27`

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