PDF malware analysis — malicious · 0b1103c985e595a0

MALICIOUS

PDF

301.7 KB Created: 2021-07-03 13:17:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 5952aa74d9e0819f041392bdcc941ec8 SHA-1: 0e19e3cbb6612533e6634e6ed60fecf355296a20 SHA-256: 0b1103c985e595a02c8146e3d5821f77da0bdff6f03590d15e65e62f7170ae0a

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URIs, including one pointing to a raw IP address, and links to compromised WordPress upload storage. These indicators suggest the document is designed to redirect users to malicious sites, likely for phishing or to download further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9774

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
Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL

PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
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.
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://chcial.ru/uplcv?utm_term=fundamental+critical+care+support+5th+edition+free+download PDF link annotation
- https://electrabicycles.pl/app/webroot/uploads/file/16209509861097.pdfIn PDF document text
- https://baoholaodong24.com/userfiles/file/32199826082.pdfIn PDF document text
- http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/60789482440.pdfIn PDF document text
- http://huile-de-nigelle.info/userfiles/file/46973305558.pdfIn PDF document text
- http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/bs29s302rajvl7kfn8t5f2tuo8/pamazegimawuzevozaze.pdfIn PDF document text
- http://piotrkowska77.pl/zdjeciafile/11393799459.pdfIn PDF document text
- https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/b7031aaf95c9c05d5ddfb7791e1bddbc/91814275262.pdfIn PDF document text
- http://hhtaitung.com/CKEdit/upload/files/nudupepetumewowubavesiguw.pdfIn PDF document text
- https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8935e3485---mimuvaremojakegef.pdfIn PDF document text
- https://samtee.com/admin/images/file/70402636962.pdfIn PDF document text
- http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffa2fde4c1---soxavidopabuw.pdfIn PDF document text
- http://geniuschulatutor.com/userfiles/files/93093435469.pdfIn PDF document text
- http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b44d97db994---xejuvulafataro.pdfIn PDF document text
- http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/f43eif2bnnge8269j87nkg3ll1/bikasabunewubakulubot.pdfIn PDF document text
- http://fine-cottage.ru/userfiles/files/faxekedekudewatumaxenax.pdfIn PDF document text
- http://www.vegagastro.pl/upload/file/46793805443.pdfIn PDF document text
- http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16094db6f0e748---29565057750.pdfPDF link annotation
- https://duext.com/wp-content/plugins/super-forms/uploads/php/files/8f032c22fa741af041b1dd781efc1f71/xixawakeparotaduganat.pdfIn PDF document text
- http://xboxheerlen.nl/userfiles/file/lofeteluxirewevifafikerut.pdfIn PDF document text
- http://brownewingfamily.com/clients/a/a4/a4d7a48ed280e719b438ae57db99af5e/File/17632915204.pdfIn PDF document text
- http://ofipapel.org//ckfinder/userfiles/files/50030293146.pdfIn PDF document text
- https://n-zvuk.ru/upload/file/6004856518.pdfIn PDF document text
- https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/7c1f4102b04299f86888a289c1fcca2a/25459049135.pdfIn PDF document text
- https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/repowomosavufovevivopoj.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_off00044589.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x44589	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00045da0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x45DA0	11180 bytes
SHA-256: `f59cc4e4fb1e754cf026cf9be93864637a8f1b8c8b5e32ae39d94afcc7343875`
`font_02_sfnt_off0004779c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4779C	18428 bytes
SHA-256: `6c611cf7a00ada98f75a0f36605c77a2c0991e152da9bcbff82a804bdcf68ca4`

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