PDF malware analysis — malicious · ec852cd29e4f5248

MALICIOUS

PDF

62.3 KB Created: 2021-10-03 04:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 6df280c8dc1536e4a7d97de0b8decedb SHA-1: ffde321a121c0b0804febb5395641f3d469279fd SHA-256: ec852cd29e4f524877c753def16d66259f2fc1ac60a666b93680cdad223ae7ac

174 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF is identified as an image-based lure, typical of phishing campaigns, containing numerous links to external sites. The presence of multiple links pointing to compromised CMS uploads and disposable hosting suggests an attempt to distribute malicious content or redirect users to phishing pages. ClamAV detection further supports its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.5307

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
Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE

PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 62 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
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://nomylo.ru/uplcv?utm_term=you+in+asl PDF link annotation
- http://boschvietnam.vn/files/usersfiles/files/zupapumevofugapili.pdfIn PDF document text
- https://isigakizima.net/img/tmp/file/sukogeduberuvim.pdfIn PDF document text
- http://sunway.me/ROOT_PATHuploads/file/080213238709.pdfIn PDF document text
- https://grafconsulting.pl/Upload/file/biruwusekovitirisepoxofax.pdfIn PDF document text
- http://tai-group.com/upload/files/99198707168.pdfIn PDF document text
- http://byecook.com/ckupload/files/63820447530.pdfIn PDF document text
- http://alteredcompta.com/buddha/ckfinder/userfiles/files/37302577243.pdfIn PDF document text
- https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/l2eggd1q7tv7vko4ce1pt6nl0a/25831715049.pdfIn PDF document text
- http://prasongp.com/file_media/file_image/file/xegumobibogevufefijagisi.pdfIn PDF document text
- https://etadelloro.it/images/file/limira.pdfIn PDF document text
- https://propage.q-cloud.net/upload/ckeditor/pages/files/xetubonudo.pdfIn PDF document text
- https://szabobuszrendeles.hu/files/files/pebatum.pdfIn PDF document text
- https://watfordfairtrade.org/app/webroot/img/files/wanowelegowoxed.pdfIn PDF document text
- https://defrokatilai.lt/images/files/popokuzodelurezipe.pdfIn PDF document text
- https://dazhonghua1688.com/ckfinder/userfiles/files/69147017850.pdfIn PDF document text
- http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/fezekawigi.pdfIn PDF document text
- http://sahrugs.com/userfiles/file/doroli.pdfIn PDF document text
- https://mariellatriolo.it/public/file/lokefawopamew.pdfIn PDF document text
- http://6nergy.fr/6nergy/sites/default/user/file/78579430704.pdfIn PDF document text
- https://tranthachcaodanang.com/uploads/image/files/ginara.pdfIn PDF document text
- https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/082a5e9f9bc102c41ce68cb7eaa730fe/15175814810.pdfIn PDF document text
- http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614461ff1c97a---mafipuk.pdfIn PDF document text
- https://quangcaomattroi.com/uploads/news_file/61404024054.pdfIn PDF document text
- https://stmpallet.com/ckfinder/userfiles/files/mumuradakokiwe.pdfIn PDF document text
- https://cairparavel.ro/app/webroot/files/userfiles/files/59244259879.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_off0000b2ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB2AB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000cac1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCAC1	9856 bytes
SHA-256: `8bc5fee4903408dba8d380a597a1b85f75d6c8c0caed7bebb5ca285adb611b47`

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