PDF malware analysis — malicious · 9be8995a6ffe3a23

MALICIOUS

PDF

87.9 KB Created: 2021-07-02 20:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 9f482d5275012671008f60b07887aee7 SHA-1: fd3eef791c7571948455e87f528391832250a43c SHA-256: 9be8995a6ffe3a23cb4eb6d74c6b09010ea70637b1aa7e61b47a88c6be6eb7f3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to external sites, many of which are hosted on compromised WordPress installations. The PDF structure and embedded links suggest an attempt to lure users to malicious or compromised content, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://travelstore.tn/userfiles/file/zegefikutikemolakozelufo.pdf In PDF document text
- https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/fe6882373f667b4014159c2835b4d68b/murixodaxubo.pdfIn PDF document text
- https://hiddencliff.kr/FileData/ckfinder/files/20210609_2935382E047385EC.pdfIn PDF document text
- https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/f2d65604a0c755071ee2ba315a083604/tosar.pdfIn PDF document text
- https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16080ba7746822---kurodufufovenugoxe.pdfIn PDF document text
- http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8fb014d38---45033900411.pdfIn PDF document text
- http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c4e73d2aa---xoneturukegokadoloxatorat.pdfIn PDF document text
- https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096290978659---1644489215.pdfIn PDF document text
- http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cac93b3ba77---luvamomavexiletaxalifewum.pdfIn PDF document text
- http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aac8ff3e982---70143156968.pdfIn PDF document text
- https://mertlakustika.cz/images/pages/file/julunup.pdfIn PDF document text
- https://agatanorek.com/files/file/gepujusokoweb.pdfIn PDF document text
- https://sonntag-immobilien.lu/userfiles/files/75059334626.pdfIn PDF document text
- https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/6d8a414702f30afd3251c42846c4b8b0/dexidebemoboj.pdfIn PDF document text
- https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/93rk979l8ap6bkob0sft2mgjjp/8937882500.pdfIn PDF document text
- https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de2aa8dfff---35147800988.pdfIn PDF document text
- https://securityguardsupply.org/php/uploads/file/deritefasumofo.pdfIn PDF document text
- http://townsendrogersfamilyreunion.com/clients/9/91/912616e09393d205379ff76530a10a1f/File/63430710989.pdfIn PDF document text
- http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c73a9347d39---45704010088.pdfIn PDF document text
- https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/55e0c9740c8635914c1b3b8afb4ee806/67617667336.pdfIn PDF document text
- https://promise-land.com/upload/file/denesovapob.pdfIn PDF document text
- http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a24b97439c5---wetotatevowamupijivewapi.pdfIn PDF document text
- http://aep-tc.com/cache/fck_files/file/3464128288.pdfIn PDF document text
- https://contabil-fiscal.ro/mm/file/pixafirudarutosetapi.pdfIn PDF document text
- https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/49b79e3053eb4601abc59211fbf6b414/21273215140.pdfIn PDF document text
- http://anatolianlgs.com/userfiles/file/54061271250.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=yoga+for+calm+mindPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f66a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF66A	10404 bytes
SHA-256: `c8551d8b5634a8766481fa93e627316efb1962edeb61ad80f8ad0475166b16ad`
`font_01_sfnt_off00010daa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DAA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000125bc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125BC	16664 bytes
SHA-256: `0538d0757e48d0d65f380a6cf8ab45c1e7c3c3134e74307bd23a87bb8c2386fb`

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