PDF malware analysis — malicious · e069de5a1c03d973

MALICIOUS

PDF

86.9 KB Created: 2021-07-17 21:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 0aee5c94e19c212e2bbd2c397100aa11 SHA-1: 324619a52d642acb3fd9d54d8b3ddb7c5dddebb3 SHA-256: e069de5a1c03d9733108ba6b6699d1a1ea33e84b078e8430aa0ef6b2403ec8c4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous external PDF files hosted on potentially compromised or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of these links indicates a likely phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 6

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
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 http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/kuzivosenarixofusulotapom.pdf In PDF document text
- http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9fd4a2858---37478200956.pdfIn PDF document text
- http://bogelaipigeon.com/upload/file/ninuvire.pdfIn PDF document text
- http://broadviewlibrary.org/uploaded_bvlib/file/26398133054.pdfIn PDF document text
- http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608674eca9394---gotesomirisefa.pdfIn PDF document text
- http://oticonshop.net/ckfinder/userfiles/files/9483811680.pdfIn PDF document text
- https://karapinarinsaat.net/userfiles/upload/file/23148317355.pdfIn PDF document text
- http://robbes.nl/media/files/28904661355.pdfIn PDF document text
- http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bd9a17f30---91795096291.pdfIn PDF document text
- http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/fb35d6c64972d2fb90dd9a93307d5af8/78646923494.pdfIn PDF document text
- http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/ho7nlfd6ptm9bukecploe5mgf1/kapigijuwif.pdfIn PDF document text
- http://fsnmmaterials.com/UPFILE/userfiles/files/lolugesevusofodu.pdfIn PDF document text
- https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b6a8520ff0f3756d201511e3d7576e7a/tavebofusezuxe.pdfIn PDF document text
- http://extracam.es/app/webroot/arxius/file/4583493618.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb5069a8729---didaram.pdfIn PDF document text
- http://armanetti.com/images/letevaduxudukikomijo.pdfIn PDF document text
- http://ok-poland.com/userfiles/file/ratowupadafijuranegemit.pdfIn PDF document text
- https://bloomeng.com/uploads/renizaxepogerativis.pdfIn PDF document text
- https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/37a8540a2e45165ae6cc232569532158/75371189737.pdfIn PDF document text
- https://spacio.hk/attachment/file/sodukozoxokugosawaneda.pdfIn PDF document text
- http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/bch2ht33glesqrpit7bpmj87e6/677189737.pdfIn PDF document text
- https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2f0d7046c---88155486563.pdfIn PDF document text
- https://haps.company/wp-content/plugins/super-forms/uploads/php/files/ue226poetejoepptdvt47rf490/58608750657.pdfIn PDF document text
- http://amuseonline.com/absite/userfiles/file/muxuxe.pdfIn PDF document text
- http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bad9aa617d---63286665240.pdfIn PDF document text
- http://e-hematologica.pl/users//file/2624660180.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=canon+in+d+river+flows+in+you+piano+sheet+musicPDF 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_off0000ebf6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBF6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010408.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10408	17880 bytes
SHA-256: `b90a2e49f5fc6060b41362e5f7fc6beae1727f865ef13275c8c1bf577e764561`
`font_02_sfnt_off00013363.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13363	11284 bytes
SHA-256: `ee02e1c39799d4ceffa8388156799b117a77a244f2c03e231fdc7a22227ae296`

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