PDF malware analysis — malicious · 3e9519aa44164878

MALICIOUS

PDF

84.4 KB Created: 2021-09-04 11:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: f6867774709f4a8dbe148140d9be1a81 SHA-1: b675a3588cf8e629e53637dba4d50e13b525c973 SHA-256: 3e9519aa44164878c3d5749b45d0a63463f32a2c46f1dcbed9ddb731737c1fbb

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall detection indicate a likely phishing or malware distribution attempt.

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://synerhu.ru/uplcv?utm_term=lacan+the+real+pdf PDF link annotation
- http://gayaarchi.com/userfiles/file/20210609004510.pdfIn PDF document text
- https://radekslodkiewicz.pl/files/file/90539378019.pdfIn PDF document text
- https://amatnieks.com/pictures/image/nawezuluxasova.pdfIn PDF document text
- https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608b25f61bd1f---47936215167.pdfIn PDF document text
- https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/9cf00112f620d75c9d64c860818a26f5/jizewogoputikavaribil.pdfIn PDF document text
- http://househouse.it/userfiles/files/vobixam.pdfIn PDF document text
- http://gramercy-grand.ru/files/file/5295480156.pdfIn PDF document text
- https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/jpucq9q836malbcsce18kubeif/nilagawosabow.pdfIn PDF document text
- http://nhatminhtrading.vn/app/webroot/uploads/files/11000226918.pdfIn PDF document text
- http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d15155a15d---52428500260.pdfIn PDF document text
- http://endobible.com/userfiles/file/45146242428.pdfIn PDF document text
- http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f7a45e8038---bipuberivano.pdfIn PDF document text
- https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/88dc9d01a5676f810a6abc5c48787f39/9482305878.pdfIn PDF document text
- https://isosklo.cz./uploads/sanutuweduxoduwu.pdfIn PDF document text
- https://mamalight.net/business_school/uploads/file/3306150563.pdfIn PDF document text
- http://citytrafik.nu/images/file/17946802996.pdfIn PDF document text
- http://animalscipublisher.com/files/upfiles/file/vumagedatomelezonolovufu.pdfIn PDF document text
- http://scales-center.com/shop/fck_file/file/45863607449.pdfIn PDF document text
- http://xdata.pl/app/webroot/img/ckf/files/4142335947.pdfIn PDF document text
- https://oxfordjsr.com/userfiles/file/22418746977.pdfIn PDF document text
- https://sayurmateng.com/contents/files/23235635175.pdfIn PDF document text
- https://grupahatak.pl/admin/_fck_files/file/13531136055.pdfIn PDF document text
- http://podlahyadvere.sk/editor_uploads/system/files/golopava.pdfIn PDF document text
- http://tai-group.com/upload/files/nazuluxigofomejaz.pdfIn PDF document text
- https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/0e65d4beff4f7697505ac55265056438/tizuvuzutosinitazen.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_off0000e828.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE828	10296 bytes
SHA-256: `87cf675fea26a865287dc73a16eb3c6e65bf07cef399f39c7a56bc32c59dc787`
`font_01_sfnt_off0000ff40.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF40	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011752.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11752	17176 bytes
SHA-256: `22b4eea2bb86c8c1257cbedd463483597b9af3530f8e31921af5e6ee401cdeaa`

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