PDF malware analysis — malicious · b7c89a0b2f54742d

MALICIOUS

PDF

72.3 KB Created: 2021-09-07 02:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: aa9d31f15210227b15e61ac523802b85 SHA-1: cb6fe32ab3bc97d7edbbbce8dec9c61827a163da SHA-256: b7c89a0b2f54742dfc60f016eea4660a99ee39b972dfa4a259d2cc5cc183f93a

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV. Static analysis revealed numerous URLs embedded within the PDF, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to direct users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier suspicious score 0.4393

Heuristics 5

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
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://cructi.ru/uplcv?utm_term=compendio+manual+de+la+biblia+pdf PDF link annotation
- https://zivotzaokny.eu/res/file/felomesuxatoxotivede.pdfIn PDF document text
- https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/c95de1610d43a8cf1926e2631db7d2a8/tagalajazulerumurobekijob.pdfIn PDF document text
- http://cosmikkino.ru/sadm_files/60690884984.pdfIn PDF document text
- http://meyanko.com/userfiles/file///folopevajuzojajetido.pdfIn PDF document text
- http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070791a8892e---57899127515.pdfIn PDF document text
- https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/lcj3colrbrhbg5d3jh324esfht/kinomujevekosozamenuv.pdfIn PDF document text
- https://debo-fit.be/userfiles/file///setorakidifololadojexefen.pdfIn PDF document text
- https://iringmalaysia.com/ckfinder/userfiles/files/32614323883.pdfIn PDF document text
- https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b74a87ca6031e9dc5bc1cbd626cd1c14/suwumu.pdfIn PDF document text
- https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16091d8c8966e6---xixoromatifo.pdfIn PDF document text
- http://polipadel.com/userfiles/file/45086486070.pdfIn PDF document text
- http://j1medical.com/uploaded/file/kodulasemagekixip.pdfIn PDF document text
- http://wx-test.com/upload/ckimg/files/202108131847109770.pdfIn PDF document text
- https://jbdclothiers.net/emailer/userfiles/file/75950551959.pdfIn PDF document text
- https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/bf27252ae1c4ddfa122a0621de4d3ad0/tugemilowonifemokevum.pdfIn PDF document text
- https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/9405a8d73ef5df02a97f6455275ee4b9/27238825688.pdfIn PDF document text
- https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/2j10r71el9616n96bce7bmboi2/budil.pdfIn PDF document text
- http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075f696e0cb5---5808167732.pdfIn PDF document text
- https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ndmi780a34lu61gpskro55lfmp/70842770391.pdfIn PDF document text
- http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160799b18dea43---55376595949.pdfIn PDF document text
- http://nkmate.com/FileData/ckfinder/files/20210717_2FF1A3F4286EDAB4.pdfIn PDF document text
- https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/0laj5guj18jqihmu03shbe31sl/kutukusikagijuzob.pdfIn PDF document text
- http://vasantviharproperties.com/userfiles/file/6767579519.pdfIn PDF document text
- http://enidbtwcreunion.com/clients/5/52/52e94d62e82ff66504c7d921fc07bf70/File/85977057756.pdfIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cf1b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF1B	10564 bytes
SHA-256: `f82665316dc64c7be13f004f5d0990de4213d90aff0fd6ca5e47966e22e32190`
`font_01_sfnt_off0000e6e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6E4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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