PDF malware analysis — malicious · d88e2752b7b99f58

MALICIOUS

PDF

77.7 KB Created: 2021-09-12 14:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 8b73c75cb3181df1eefc6db2d270b5ab SHA-1: bfcb466fc903363fc84d7078e49c91c44cf3c502 SHA-256: d88e2752b7b99f58903fc9f95aabc0c3b0689ae080d46cb1f459fc1de7c4fd64

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with high confidence. It contains numerous external URIs and is flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of XFA forms and embedded URIs indicates potential for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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
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.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
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+contacts+from+iphone+to+android PDF link annotation
- https://ltssinternational.com/res/wysiwyg/file/gutarume.pdfIn PDF document text
- https://cosonnguyenthanh.vn/webroot/userfiles/files/84036818199.pdfIn PDF document text
- http://venus-forever.com/image/files/wimim.pdfIn PDF document text
- https://fundacjanadzieja.com/images/wyswig_images/file/zulejebamuliwumebutas.pdfIn PDF document text
- http://benetalent.com/upload/files/52516038172.pdfIn PDF document text
- http://orosweb.hu/userfiles/file/vanuzilesas.pdfIn PDF document text
- http://fredericjean.net/oplusco/file/perejerekonikubezosezur.pdfIn PDF document text
- https://altinhediyeler.com/calisma2/files/uploads/94385819439.pdfIn PDF document text
- https://alternativecarrepair.nl/userfiles/file/91139979597.pdfIn PDF document text
- http://vitalbafitnessclub.eu/userfiles/files/11109312137.pdfIn PDF document text
- http://vwtint.com/userData/board/file/wazed.pdfIn PDF document text
- https://lacgl.org/upload/editor/file/lilevob.pdfIn PDF document text
- http://yuanhebiotech.com/upload/files/468183421.pdfIn PDF document text
- https://yumasri.com/assets/ckfinder/userfiles/files/79952899162.pdfIn PDF document text
- https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a45e4fbf2---89075522407.pdfIn PDF document text
- http://ahrestygz.com/userfiles/files/20210912_153311.pdfIn PDF document text
- https://pianoinprimopianofestival.com/uploads/file/xoxenasogo.pdfIn PDF document text
- http://bindashnews.com/userfiles/file/senagusisazusonexapel.pdfIn PDF document text
- https://associazionedynamica.it/uploads/file/fiwarunafefalux.pdfIn PDF document text
- https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/rqt0j88oi6b8lkrcnigu81u6mi/bulojixor.pdfIn PDF document text
- https://sakura-bashi.com/uploads/files/202109051300347236.pdfIn PDF document text
- https://kanat.com/upload/ckfinder/files/55000015130.pdfIn PDF document text
- https://careersourceokaloosawalton.com/files/public/38254160964.pdfIn PDF document text
- https://taxforce.nl/userfiles/files/tebizesagek.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_off0000ca35.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCA35	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e247.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE247	17664 bytes
SHA-256: `e8ec168a85978cd7f24b56d5fa70a7371bce5e07c2978e91efcf7f388530e703`
`font_02_sfnt_off00010fc4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FC4	10916 bytes
SHA-256: `3aad9726d1761da07ca6971c1f8095e9e2c0352b702f00205087715256504ae9`

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