PDF malware analysis — malicious · caef05cc0425ae74

MALICIOUS

PDF

105.1 KB Created: 2021-06-27 01:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 92ed58f80efab197e7822b3efe49d2fb SHA-1: 2984c67f1d4ebc9f28b901555ee1bc626d8cf53e SHA-256: caef05cc0425ae7422857e000ce47d249ca1945eae42d1213b93d60fd17051bb

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting it is used to distribute malicious content or phish users. The presence of external URIs and link farms indicates an attempt to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9926

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/hpphp7942m1umb78kqpbc3mo31/bimilizunerabijezilevoj.pdf In PDF document text
- http://gtshotel.it/images/file/kozeluf.pdfIn PDF document text
- https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160982f4f02e26---1663315903.pdfIn PDF document text
- https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/1c8e8ced7b454722ff29da874b6dbe58/xidoxipozozigepafiruv.pdfIn PDF document text
- http://techniq.ae/admin/uploadfiles/file/8184109811.pdfIn PDF document text
- http://posekatzahradu.cz/files/file/belinenemirezasogeretiwo.pdfIn PDF document text
- https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/cf7c50c2184f3f606eb875b092490af0/99541111563.pdfIn PDF document text
- http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bed53a94e9f---kuletopipun.pdfIn PDF document text
- https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c69e53f26a---20385216341.pdfIn PDF document text
- https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3ef3810a3---8235547265.pdfIn PDF document text
- https://fonixkoncert.hu/upload/file/wopokefeloriketadozenebe.pdfIn PDF document text
- https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/it2d9a9je05voisu5ni4vobjdc/62111265675.pdfIn PDF document text
- https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608122a2db8ba---fedudob.pdfIn PDF document text
- https://wsbtitan.com/images/file/zosoki.pdfIn PDF document text
- http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c05cbe93c---65677887621.pdfIn PDF document text
- http://shethof.ch/cgi-bin/dynamisch/file/75872835474.pdfIn PDF document text
- https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/d03c996bdfc4ef50c5caf80efc2c90d0/begenurefakiporotogaj.pdfIn PDF document text
- http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b34c6495b9---44367773746.pdfIn PDF document text
- http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06856e056a---kunolesoz.pdfIn PDF document text
- http://jinxinghotel.com/uploads/files/91268740033.pdfIn PDF document text
- http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607830bfd28da---36637253234.pdfIn PDF document text
- https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160710b18d1e29---73342453242.pdfIn PDF document text
- https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b46c6b07d8d96a9ae6b11d00b4ca9e05/58642665173.pdfIn PDF document text
- https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6f801dea4a---39980551868.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+properly+cut+a+dragon+fruitPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00012e32.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E32	10916 bytes
SHA-256: `7a819733a433471a0be6546f2c365488845f353be42b46263a4c953591896b2d`
`font_01_sfnt_off00014767.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14767	21192 bytes
SHA-256: `72e573bc04213ce9e8aebe3b7787795e8af555cd2f2fb3e989fe4926f6395d04`
`font_02_sfnt_off00017d20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17D20	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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