PDF malware analysis — malicious · 74cdb44e4f9e9f6b

MALICIOUS

PDF

83.7 KB Created: 2021-09-16 08:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: c20fa1ede5eb2ad858007df5f3beea9a SHA-1: 3fb0c4d422450f88e92f06070b1659f295ebfada SHA-256: 74cdb44e4f9e9f6bc1c90c011cb6cfde6385643c0ca956962a90350a03b96358

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a potential phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9783

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://smidgel.ru/uplcv?utm_term=ludo+king+mod+apk+hack PDF link annotation
- http://zl369.net/userfiles/file/sizera.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141244b5021f---1492794353.pdfIn PDF document text
- https://nistd.in/userfiles/file/fimazoko.pdfIn PDF document text
- https://tttinox.com/upload/userfiles/files/diriwomofebotagosusuro.pdfIn PDF document text
- http://debseven.net/UserFiles/File/95441238034.pdfIn PDF document text
- http://smolninskayahotel.com/userfiles/file/75066543189.pdfIn PDF document text
- https://seger.cz/userfiles/file/1965067870.pdfIn PDF document text
- http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16130b7a0ee89a---xofamuxu.pdfIn PDF document text
- https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/1e73o6jm3ojd8ld7t1ad7808s0/66474167322.pdfIn PDF document text
- http://mazdooradda.com/userfiles/file/mikife.pdfIn PDF document text
- http://www.saaegfpolis.org.br/ckfinder/userfiles/files/83525743117.pdfIn PDF document text
- http://ranfeng.com/userfiles/file/2021-9///202192614486823.pdfIn PDF document text
- https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/nu72r87va9dp70vh1bv3lipcjf/32369422095.pdfIn PDF document text
- https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/fe5e106031d059d09f6641fcec0d3330/salovapifuko.pdfIn PDF document text
- https://venus-forever.com/image/files/28561399441.pdfIn PDF document text
- http://mya1fc.com/files/ckuploads/files/4894454863.pdfIn PDF document text
- http://ihdbd.org/upload/files/46313639024.pdfIn PDF document text
- https://rugerwafers.com/demo/ruger/beta/userfiles/files/kamikotuwumefapuwaneb.pdfIn PDF document text
- http://fixafilm.se/userfiles/file/36214999777.pdfIn PDF document text
- http://www.egymast-segito.hu/uploaded/fck/file/tasodixapixexev.pdfIn PDF document text
- https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/sulalagisa.pdfIn PDF document text
- http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/10009331598.pdfIn PDF document text
- https://thehideawayresortpattaya.com/userfiles/files/ligelefideza.pdfIn PDF document text
- https://quasar.mago.ro/ckfinder/userfiles/files/rexupigujanesefidorisi.pdfIn PDF document text
- http://taxfreepoint.com/file/wetejoxedaziwemase.pdfIn PDF document text
- https://electroagro.es/pub/files/39170772576.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_off0000c36d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC36D	16164 bytes
SHA-256: `a0f26d9ec2bc0bbc84dfb8c1a224a49f7f70479ac92e21d726acd811d43f3bd1`
`font_01_sfnt_off0000d912.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD912	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f129.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF129	10564 bytes
SHA-256: `c83d382b8a573de89b9d49c40b235867094a0226891e1669c3e8c6a2ef469a50`
`font_03_sfnt_off000108cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108CD	21712 bytes
SHA-256: `a8d61553f2466d59a80f6ceb6f503114d26158fdf8ef39e48ce1991ccb7c8d91`

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