PDF malware analysis — malicious · 76130e13c1e0f8fb

MALICIOUS

PDF

82.7 KB Created: 2021-09-01 18:36:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 58628aad936ae8408db35f884072ec7b SHA-1: 8ee0f3935967cdc14b4ef625477cf1f9bc6b9bf9 SHA-256: 76130e13c1e0f8fbf9b6ed47a718baa978f92a8cc17c0796a20e0f4b722d99a2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links pointing to various domains, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple external URIs and link farm heuristics confirms the document's purpose is to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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 https://coretry.ru/uplcv?utm_term=smelting+copper+with+iron PDF link annotation
- http://humanlitech.com/files/files/47728982978.pdfIn PDF document text
- https://ladida.asia/sporlegen/administrator/imagetempfile/delamivawarovadufekivirij.pdfIn PDF document text
- https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecd6ea32b7---73168105807.pdfIn PDF document text
- http://aps-mes.com/files/file/wanixezogitoturon.pdfIn PDF document text
- https://www.sterlingsez.com/ckfinder/userfiles/files/91174605036.pdfIn PDF document text
- https://wilocom.ro/ckfinder/userfiles/files/40686644479.pdfIn PDF document text
- http://nkland.org/userfiles/files/ruvilifejejuferidofarariv.pdfIn PDF document text
- http://bwc.lt/i/60368012687.pdfIn PDF document text
- https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16097685fd9942---4617072498.pdfIn PDF document text
- https://meganimal.pt/site/upload/file/92978023057.pdfIn PDF document text
- https://soosekszer.hu/upload/files/62273768680.pdfIn PDF document text
- http://cdmatik.com/uploads/file/pakadiwaliritufo.pdfIn PDF document text
- http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/dimowakume.pdfIn PDF document text
- http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16074f902c085e---fusav.pdfIn PDF document text
- https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/ba9e96d1b311b87a443443b01345806f/20681737451.pdfIn PDF document text
- https://mygoaltv.com/ipp/images/uploads/files/bevuputezipamojiwafumu.pdfIn PDF document text
- https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/f2d8e3d590b4881a16138b8fcd0f740b/ravadadipovun.pdfIn PDF document text
- https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/33e7438731303ff9a19086a16e025b69/kagodasepatadubelimixajuv.pdfIn PDF document text
- http://zap-interactive.com/uploads/files/zafumabo.pdfIn PDF document text
- http://arunimaflavours.com/userfiles/file/zolovezojerizubewomexepew.pdfIn PDF document text
- http://garystrike.com/clients/3/30/301ae0ed988f9237e4cb8f8c41f6cb36/File/nupifimurunarazuwoxud.pdfIn PDF document text
- https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/4ad298d55d5e3f4640ec842c388d6a40/lutavisisomipifojalik.pdfIn PDF document text
- http://homeopathyhongkong.org/files/fixebekak.pdfIn PDF document text
- https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/xuber.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_off0000ddb8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDB8	18348 bytes
SHA-256: `7c8bd6cde3881f6a2bf56f85d06b2a0b12ca8f25e73e46e4af79b38abbe4e0e6`
`font_01_sfnt_off00010d06.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D06	10652 bytes
SHA-256: `2af88c0d7125075d3060acaeaae6b0a7108aae88f6871de0cb2ceebe36af2476`
`font_02_sfnt_off0001253b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1253B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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