PDF malware analysis — malicious · e03efae9e40ef438

MALICIOUS

PDF

75.2 KB Created: 2021-07-18 00:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: a1069ae1824b85719bf716d3522ff9f1 SHA-1: 703688b4b97042ebdaa72f55b4ba46cd2af886e4 SHA-256: e03efae9e40ef438882288c92aace66f9eabdb4d79b9a5a4028708d70ec96829

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs pointing to compromised WordPress sites, suggesting it functions as a link farm. The presence of these links, combined with the PDF format, strongly suggests a phishing or malware distribution vector, likely initiated via spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

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://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ecb94b77d---40163665034.pdf In PDF document text
- http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a351ace84---48519030623.pdfIn PDF document text
- https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/de512b8388a69ba975a128d8f2a35000/55170435415.pdfIn PDF document text
- https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/264eb8558d6af983fdae46e6fe8e8e75/dotuxetatajokido.pdfIn PDF document text
- https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/b4731060de30fdadf72a9483cfeecff9/bifurizuxupevewuwuxurabiv.pdfIn PDF document text
- http://arunimaflavours.com/userfiles/file/46857610648.pdfIn PDF document text
- http://urgentcarepb.net/userfiles/file/8903632622.pdfIn PDF document text
- http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/milixogibegobubu.pdfIn PDF document text
- http://tamker.hu/userfiles/file/jewopexoviwobaxez.pdfIn PDF document text
- http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608066074457a---kulivafixotawigodij.pdfIn PDF document text
- http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2804bf50d---50743425333.pdfIn PDF document text
- http://atdawnwelift.com/userfiles/file/85272011632.pdfIn PDF document text
- http://zenithmetals.com/files/sulexoximozolovoza.pdfIn PDF document text
- https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/3a04dd9dd0b94dd1989d9a7e513552d6/2882515476.pdfIn PDF document text
- http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9e98bb78d---gomamev.pdfIn PDF document text
- https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/e5c95171e21f3ddcab36f6bb08a32f66/vogekusisu.pdfIn PDF document text
- https://tort-art.ru/userfiles/file/gisopusawiviv.pdfIn PDF document text
- https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/392ae72b4a3cb3c137380158f4cb1b5c/41195881431.pdfIn PDF document text
- http://fygl.net/uploads/file/281227225582.pdfIn PDF document text
- http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ba79b8f9b---33588703613.pdfIn PDF document text
- http://policylic.com/uploads/files/98412841620.pdfIn PDF document text
- http://eiak.org/upload/editor/files/mukubo.pdfIn PDF document text
- https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609298fd4e399---kalerogilatutixox.pdfIn PDF document text
- https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/d6b44e87f145785747bc67e5d211dfc7/dufokuxotajojug.pdfIn PDF document text
- https://oriental-kitchens.com/userfiles/files/40813579953.pdfIn PDF document text
- http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3242b83689---31139223831.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=crossfire+bared+to+you+pdfPDF 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_off0000c5ff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC5FF	10728 bytes
SHA-256: `86ebebcd5052e5c25817049ea623cc3344a2b4f27205c429366da313501d6918`
`font_01_sfnt_off0000de9f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE9F	15940 bytes
SHA-256: `e2b4726ce561c6fdc29a9821a2d7c3725c1b15fb0e7aa6bc03d8edefd98106a4`
`font_02_sfnt_off000107ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107AC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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