PDF malware analysis — malicious · a64b699b482b4da0

MALICIOUS

PDF

77.6 KB Created: 2021-08-01 21:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 677aa845fb808ea8cb15fb14cc108478 SHA-1: 4975f5cf424cdc66b0792f2d1c3605429e19c86b SHA-256: a64b699b482b4da0498462776b783771905e02f3948da7297d7be69e7f1fb130

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to distribute malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to trick users into downloading files, likely malware, under the guise of useful software.

Machine Learning

Nyx PDF Classifier malicious score 0.8351

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 http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5ebf65945---gowipegev.pdf In PDF document text
- https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/dee9f0e6094771795a9e24f4c564ba72/lopikexu.pdfIn PDF document text
- https://rux-thai.com/ckfinder/userfiles/files/79533037115.pdfIn PDF document text
- http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32b96bce10---bavugodikisade.pdfIn PDF document text
- https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16086fcb614971---mofilapu.pdfIn PDF document text
- http://aryajob.com/user_upload/file/vilinoziwesipe.pdfIn PDF document text
- http://birons.net/wp-content/plugins/super-forms/uploads/php/files/0a76ba0690557c4023665acc3e85544a/11306218182.pdfIn PDF document text
- https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/mhengtv9apr3ilao848p9abpsj/75297636068.pdfIn PDF document text
- http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd58dcba2f0---11087559647.pdfIn PDF document text
- http://sushi-belovo.ru/files/8617571252.pdfIn PDF document text
- http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c480d022c---xefirakasiwele.pdfIn PDF document text
- http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/39b7a29f012d72204a09b0fbfe6b1e4a/67987299129.pdfIn PDF document text
- http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8c78c9d625---63535075256.pdfIn PDF document text
- https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160dee4516c0a8---91407733778.pdfIn PDF document text
- http://bioterapiazabiegi.pl/obrazy/file/72709434121.pdfIn PDF document text
- http://francisfamilyreunion.net/clients/870293/File/62162899269.pdfIn PDF document text
- http://abworder.com/uploads/files/54276072120.pdfIn PDF document text
- https://cahayamimpi1.com/contents//files/mepoperitibulobezerilo.pdfIn PDF document text
- https://al-farh-iq.com/upload/userfiles/file/51859361913.pdfIn PDF document text
- http://sciattella.net/images/file/gemuvomufidasatefidaloluj.pdfIn PDF document text
- http://zovsh.com/Uploadfiles/files/dufir.pdfIn PDF document text
- https://polandpools.com/contents//files/2724426925.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=easeus+data+recovery+11+crack+%26+serial+key+generatorPDF link annotation
- 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_off00010a69.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A69	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00012280.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12280	10528 bytes
SHA-256: `9cbca01755e651f773d9cae4c59beea02f5dd94fd57e0aabad60a7250c9fa97b`

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