PDF malware analysis — malicious · d24cfc8de4a2f53d

MALICIOUS

PDF

82.5 KB Created: 2021-07-20 11:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 7ce821cf4c1555d3524749b1d236ef36 SHA-1: 97fae2f9b43ea8b67bd20669a89efca69e9d5df4 SHA-256: d24cfc8de4a2f53db85dcf9e4141a949a2c513bd15f2b55f07013f744a56c530

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript, which is often used to execute malicious code or redirect users. The presence of a link farm pointing to potentially compromised CMS uploads and disposable hosting further supports its use in a phishing or malware distribution campaign, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9780

Heuristics 7

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://3eyamaichi.com/upload/ckfinder_temp/files/20210629120249.pdf In PDF document text
- https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/42ece7c5sbv3f5pv739j5mh5kf/1028132988.pdfIn PDF document text
- https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/2nflrjdgmnfmt1b4j1b6iml1o0/bisevanadajirofel.pdfIn PDF document text
- http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec0de515ae---lafidugisubagatejo.pdfIn PDF document text
- https://nutstudio.it/userfiles/file/pusof.pdfIn PDF document text
- http://viacaosaopedro.com/www/js/ckfinder/userfiles/files/vumub.pdfIn PDF document text
- https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/ba10e22b4b62ff0d9749b521abcac0eb/bagesugajuladova.pdfIn PDF document text
- http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160f3a78a5f331---19456377410.pdfIn PDF document text
- http://akcjonariusz.com/UserFiles/file/88547898390.pdfIn PDF document text
- http://skogsformedling.se/bilder_umeny/File/16612854023.pdfIn PDF document text
- http://hanasushi6.com/uploads/files/gadur.pdfIn PDF document text
- https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/f8395528e4dab3d67e5550e4a4c49f2f/gixazureranobonalifamuze.pdfIn PDF document text
- http://point-grey-1970-grads.com/clients/f/fe/fe7686cf254963525dc0bd811951f15e/File/tusodulizufoluzu.pdfIn PDF document text
- https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/cs7n4mf31lhnk82j173p2q67i5/87214854183.pdfIn PDF document text
- https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4236d8849b---kimubitegoxadosenonuze.pdfIn PDF document text
- https://webvitamin.vn/app/webroot/uploads/files/21384513004.pdfIn PDF document text
- https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/loe9ucga2mlqi20k60571ud1jv/xepugegekovezulimevosek.pdfIn PDF document text
- https://3eyamaichi.com/upload/ckfinder_temp/files/20210717071815.pdfIn PDF document text
- https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/b1a26961a41245cf81f3123468e09706/nemomuvuzilekuxilaka.pdfIn PDF document text
- http://mictrogiang.com/userfiles/files/mujemufudifexelusuda.pdfIn PDF document text
- https://ochronaskory.pl/pliki_user/File/28351341062.pdfIn PDF document text
- http://mu-rrrc.com/userfiles/file/6434203326.pdfIn PDF document text
- http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5134d1a6be---34331862261.pdfIn PDF document text
- https://rubyyadav.com/nbloom/fckuploads/file/78275472687.pdfIn PDF document text
- http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/uhn2531rrt80c2ab8hnd5olos4/muzupofuv.pdfIn PDF document text
- https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/bd01ddc4c68b310fb4a0e8964395fc5e/4553394622.pdfIn PDF document text
- http://hermangroupcorp.com/clients/3/38/389628ddbd62db2fa1e4299ecdfc1861/File/76900528627.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=parallelogram+inscribed+in+a+circle+is+a+rectanglePDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c5af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC5AF	17040 bytes
SHA-256: `d66239202153b57e26daba1d42cd91e5374d4f807c1fe5553ca8dc59cad05490`
`font_01_sfnt_off0000f290.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF290	16308 bytes
SHA-256: `b600d6a97b2917e7dc113c47777fd67c317319f2881e35515c3d227bd53eeac6`
`font_02_sfnt_off000108b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108B2	10852 bytes
SHA-256: `961263a9f413f0ae4a471318ab6873d2ab0ddebe823a2d51ab8327a1a10152fe`
`font_03_sfnt_off00012188.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12188	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.