PDF malware analysis — malicious · 0d6f0698a551faaa

MALICIOUS

PDF

82.7 KB Created: 2021-09-13 17:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: adec9bf19550515ce8dddb78e0e0ec08 SHA-1: 22de6e4b77f78fb926d0ee701d9f8f8c58436a42 SHA-256: 0d6f0698a551faaae680f1b891a880503486abb67fec54c54b3ae5be7ae0981e

176 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The document body is heavily obfuscated, preventing analysis of its specific content, but the presence of numerous links and the malicious verdict strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

Heuristics 7

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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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://garglob.ru/uplcv?utm_term=how+to+send+things+from+your+phone+to+computer PDF link annotation
- https://allcreaturesinc.com/files/files/35072512402.pdfIn PDF document text
- https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/7078719d7815b9e6ca30e8379b944675/27759526481.pdfIn PDF document text
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134636d36e29---sisokozatevuridisu.pdfIn PDF document text
- https://frisch.ro/files/file/wupowujakesevawulo.pdfIn PDF document text
- https://akapacha.com/userfiles/file/gijatomamewip.pdfIn PDF document text
- http://planet-for-events.de/userfiles/file/15623007128.pdfIn PDF document text
- http://flirdining.com/uploads/files/tizowiponarekujofakexif.pdfIn PDF document text
- http://daimarconstrucciones.com/images/admin/file/foxesuxinawi.pdfIn PDF document text
- http://www.medic-pneumolog.ro/fisiere/file/62511291184.pdfIn PDF document text
- http://ttccid.com/userfiles/file/zebebo.pdfIn PDF document text
- http://cn-daomeng.com/upload/userfiles/files/9bf99bbb3c91c58e03523e26c1643d5a.pdfIn PDF document text
- http://hoaiduc.edu.vn/ckfinder/userfiles/files/55072569591.pdfIn PDF document text
- https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/9413a200d022c50134ce3d657091f9ea/5856558987.pdfIn PDF document text
- http://polaryachtmanufactory.com/res/wysiwyg/file/6645658923.pdfIn PDF document text
- http://revize-elektro.info/UserFiles/File/41246581694.pdfIn PDF document text
- http://ctyrkolky-gamax.cz/data/dokumenty/dobuvapogewabelilulil.pdfIn PDF document text
- https://eminencesolutions.in/resources/userfiles/file/zakebujesokinibutabox.pdfIn PDF document text
- https://ecableapp.com/FCKeditor/FCKimgUpload/file/15182647190.pdfIn PDF document text
- http://matraholding.hu/images/userfiles/files/nuzuwuxukusifidu.pdfIn PDF document text
- http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161364f51c34a1---5548308751.pdfIn PDF document text
- https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/kpa9tgahl0chmpb5a33uv9ocv2/rokobim.pdfIn PDF document text
- https://megacook.pt/site/upload/file/kijoxusul.pdfIn PDF document text
- http://robwalker.net/fckupload/file/99900263074.pdfIn PDF document text
- 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_off0000dde6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDE6	11152 bytes
SHA-256: `7e393101a4522f13ec2662689e5e46b26dab5df43fed38e79eae57b029701450`
`font_01_sfnt_off0000f796.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF796	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010fa8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FA8	17636 bytes
SHA-256: `c4fdab6cdcfe35d6924d3b9c0ff69bf60b1233e574464af43cfc4b73f63b6ab6`

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