PDF malware analysis — malicious · 30ea76e0f8be9e7b

MALICIOUS

PDF

69.9 KB Created: 2021-06-17 02:29:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 192c79fcad9654e277482e9fb849e428 SHA-1: 42dfe1173fd112be1dafd86a632215f0192ca660 SHA-256: 30ea76e0f8be9e7bbdd64b771588ff7364097fa8be9eaa8ac4b45559e19decdb

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs further supports the idea of a campaign aimed at driving traffic for malicious purposes.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://ketchas.ru/uplcv?utm_term=motu+patlu+patlu+motu+patlu PDF link annotation
- http://kibbkw.com/uploads/file/27596607509.pdfIn PDF document text
- http://jnafarms.com/clients/864068/File/17046747823.pdfIn PDF document text
- http://canxetaianhduc.com/images/file/83905769013.pdfIn PDF document text
- https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5bccfdfc1a---dilaledojopegokakitikij.pdfIn PDF document text
- https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085bc571386f---pazibojuwujajovo.pdfIn PDF document text
- https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/nelvv6han4e6r2tsb60bircgp1/80070268319.pdfIn PDF document text
- http://domholidays.com/userfiles/file/sidovegesisizijaporusavas.pdfIn PDF document text
- http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/6l1micab3dc5is9e08i2gbkrb2/68267884426.pdfIn PDF document text
- http://zonweringbelgie.com/ckfinder/userfiles/files/86909258395.pdfIn PDF document text
- https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/0ff34e741c4d07f92ffa9529f0792916/zamajujigovepadakedujom.pdfIn PDF document text
- https://isleo.com/i_photos/file/10533584161.pdfIn PDF document text
- http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61cc0e5e17---bawimiwa.pdfIn PDF document text
- https://hoangnhataudio.vn/media/files/gurep.pdfIn PDF document text
- https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/4d90cb8bb93a9bbe29e1116c82abccd1/melixa.pdfIn PDF document text
- http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160928a2b5368f---gatebokuxira.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c976.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC976	4308 bytes
SHA-256: `4bb0963cb1064c592b4e70334e46130541f19b9c365961ec37539dc0cee63a60`
`font_01_sfnt_off0000d81c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD81C	10752 bytes
SHA-256: `ac35767000ba05950a04f266b2e89d74fec100c775c8d9c7fa20be48ca547f33`
`font_02_sfnt_off0000fcbb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCBB	4324 bytes
SHA-256: `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`

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