PDF malware analysis — malicious · db82ae50770e1f00

MALICIOUS

PDF

91.7 KB Created: 2021-09-10 16:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 596262df35985c3a59ed1192fcfbd3f1 SHA-1: adc951a182b7408400a3bbc33a80cfc94da9f078 SHA-256: db82ae50770e1f00b4ad2d0a1ff4ceafc320a72385845fbda7fbd7de081d64ae

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to host malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the phishing or spamming nature of the document.

Machine Learning

Nyx PDF Classifier malicious score 0.9930

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://www.heksan.com.pl/file/66827725109.pdf In PDF document text
- https://walnutcreekguide.com/wysiwygfiles/file/rasikaja.pdfIn PDF document text
- http://altaprecision.com/userfiles/file/96499043426.pdfIn PDF document text
- http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ebc3a8dc5---befagebe.pdfIn PDF document text
- http://gryfarmerskie.pl/pliki_wyswig/files/28776488060.pdfIn PDF document text
- https://hatinhjobs.com/upload/files/jesorefegumafaloj.pdfIn PDF document text
- https://samajsutra.com/userfiles/files/4892719118.pdfIn PDF document text
- http://industrialdevices.in/uploads/motaferika.pdfIn PDF document text
- http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/81111603800.pdfIn PDF document text
- http://blccy.com/userfiles/files/93240302240.pdfIn PDF document text
- https://galedo.cz/www/data/cms_files/files/jatutowofi.pdfIn PDF document text
- http://446888.top/userfiles/file/nojolugigofo.pdfIn PDF document text
- http://oasishs.com/uploads/files/20210907_154939.pdfIn PDF document text
- https://icrs-as.com/userfiles/file/12002095645.pdfIn PDF document text
- http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/powiteruzizazawis.pdfIn PDF document text
- https://betamachinery.sa/other_files/File/xugadata.pdfIn PDF document text
- https://actsonics.com/uploads/files/202109041943311677.pdfIn PDF document text
- http://cornaredo.gattinonimondodivacanze.it/themes/userfiles/files/7386046394.pdfIn PDF document text
- http://ei-windykacja.pl/upload/file/ruzawabixelavijuze.pdfIn PDF document text
- https://nexapos.com/upload/files/rebimatizevesozuloxugo.pdfIn PDF document text
- https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/0fbe93fd327535d9aac24bb17a6c1c30/51993518231.pdfIn PDF document text
- http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/gomopazuridowugaxagaj.pdfIn PDF document text
- https://magicdiscoradio.com/userfiles/file/kowiwapupoxojavonukidulo.pdfIn PDF document text
- http://utcsp.rustyramone.com/uploads/files/lasadurazinasodovakif.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=ping+apk+downloadPDF link annotation
- 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_off0000e144.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE144	10248 bytes
SHA-256: `f37337b9105e801a2519149e4f5c2c47ba7b88b8f9a52a8f4d0e0b9e08ceddb3`
`font_01_sfnt_off0000f821.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF821	16348 bytes
SHA-256: `b53313e52e17af6369fa8a44846357745d28ef750f9ec00b2071882145c39e41`
`font_02_sfnt_off00010e8e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E8E	22076 bytes
SHA-256: `2553795a3e14c831ab73cf8e80ece7452673ad22a3c0e16da0c92c7f071ea356`
`font_03_sfnt_off0001488b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1488B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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