PDF malware analysis — malicious · 49e6fab94c165a4b

MALICIOUS

PDF

98.9 KB Created: 2021-08-02 14:30:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: d66f035e6d07692ab7d44d4f9720f255 SHA-1: 67e43bc55dd6dac93d347b00288d53c1927ee500 SHA-256: 49e6fab94c165a4b3698d01f3701b4fa7836865dc88bec726360d458802307f1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggest a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall pattern indicates a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9909

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://laborke.ru/uplcv?utm_term=shell+costa+coffee+kota+bharu PDF link annotation
- http://anandamsanyal.com/userfiles/file/jilogelunetizopumaviwanu.pdfIn PDF document text
- https://www.babetravelling.com/ckfinder/userfiles2/files/5706793665.pdfIn PDF document text
- http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/aablvgq2kob3c11c78tjnihvd6/bepetujoruvixodupuf.pdfIn PDF document text
- https://eccdc.org/application/webroot/userfiles/file/79565711505.pdfIn PDF document text
- https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607ec4c6059c3---2993976361.pdfIn PDF document text
- https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/0dd22ed609db0790ff73540d97888cf7/misefifoxazo.pdfIn PDF document text
- http://stolizstekla.ru/userfiles/file/654117182.pdfIn PDF document text
- http://curry-box-deluxe.de/userfiles/file/vivexunazazurogale.pdfIn PDF document text
- http://hocikto.info/userfiles/file/mowusubiwelege.pdfIn PDF document text
- http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2cc5ec41c---mavipez.pdfIn PDF document text
- http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607203f545e0f---55297952850.pdfIn PDF document text
- http://thamdinhgiadaiquang.com/img/files/4188501480.pdfIn PDF document text
- http://guchenes.com/d/files/82282925485.pdfIn PDF document text
- http://nandeestationery.com/userfiles/files/6276305765.pdfIn PDF document text
- https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/9647806d363afd7b3cbf610a263eb36c/55069476064.pdfIn PDF document text
- http://ubest.ru/images/file/44996376326.pdfIn PDF document text
- https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fc60a8587---xobilokofu.pdfIn PDF document text
- https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/nunatowidef.pdfIn PDF document text
- https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/20ffa8b21c665cad8d79cdcd296f6160/newuxirakivafa.pdfIn PDF document text
- http://phutungvespaco.com/luutru/files/vipote.pdfIn PDF document text
- http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/6f1e94f4f32ad50f772ddfefdb4c57cc/71555818285.pdfIn PDF document text
- https://kenadong.com/contents//files/sezogujeta.pdfIn PDF document text
- http://ddrwc.net/clients/869849/File/58110008879.pdfIn PDF document text
- https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/b5024ddb0351ce77ef021e5f023840b3/fojerivudisikokad.pdfIn PDF document text
- http://www.contectrade.hu/fckfiles/file/35844629249.pdfIn PDF document text
- http://tikatalog.sk/_files/file/82418645802.pdfIn PDF document text
- https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/b239dd425810956f6a6a6a646f7040ff/31584857681.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_off00011f19.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F19	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00013730.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13730	10644 bytes
SHA-256: `c8cf25683c4a41c43b3dfa61aba56396c0f0a8a6001af3ba028f817c22e1c16e`
`font_02_sfnt_off00014fc2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14FC2	16880 bytes
SHA-256: `e75dfe021fb5fe8f1ac7704042e27d9a540b91367c3f0a86bd60950027e293d7`

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