PDF malware analysis — malicious · 7eadfd4f53beb6fa

MALICIOUS

PDF

108.7 KB Created: 2021-07-22 20:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: ba27d7d768fa4459b73e640e9dc4fd49 SHA-1: e74640df024a2eb26f3a788eeaaaaee359229c55 SHA-256: 7eadfd4f53beb6faee0fd6a953348e71c1480596a9571791df64429d72556fa7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised or disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure suggests it's designed to lure users into clicking malicious links, potentially leading to exploitation or credential theft.

Machine Learning

Nyx PDF Classifier malicious score 0.9875

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://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/winejazaruluror.pdf In PDF document text
- http://quick-thailand.com/images/uploads/file/29942298163.pdfIn PDF document text
- https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/63cf7ddaed0d23882d253b649082fa87/xapibomagijoponimixexug.pdfIn PDF document text
- http://szentistvanpatika.hu/upload/file/43849493999.pdfIn PDF document text
- https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c05b079257---52469064919.pdfIn PDF document text
- http://angarakshaksecurity.com/userfiles/file/ganeje.pdfIn PDF document text
- https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/fu0ehmc20ruhoif33g280ku4r5/80786122243.pdfIn PDF document text
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607dee88f0785---95636952945.pdfIn PDF document text
- https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/80d8da7bcd9cc11609664c8bdc8ad15f/58343490304.pdfIn PDF document text
- https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/a595f6f0a871fc3b3599ef95c82dc5dd/42626629399.pdfIn PDF document text
- http://tkvolley.pl/upload/files/51800067739.pdfIn PDF document text
- https://activepymes.com/pub/file/gusalukapojizanijepexofix.pdfIn PDF document text
- http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bcfa10a2b---migoxipew.pdfIn PDF document text
- https://aplusadvance.com/naver_editor/data/file/zipexuxadusobojaratex.pdfIn PDF document text
- https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/lri89h62lnk0thtn9n9d532sb4/23754209404.pdfIn PDF document text
- https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/mulefazofojibovopedod.pdfIn PDF document text
- http://bmcnx.com/userfiles/file/dutopowumezujevajini.pdfIn PDF document text
- https://ntiverification.com/userfiles/file/buxigawineteludizute.pdfIn PDF document text
- http://brlairport.com/images/file/juroxuterotalasit.pdfIn PDF document text
- http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075f61fa8aa7---61974731223.pdfIn PDF document text
- http://vmkmsz.hu/userfiles/file/5129808881.pdfIn PDF document text
- http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160996d929dd59---9301116409.pdfIn PDF document text
- http://udmvdpo.ru/images/files/25471219783.pdfIn PDF document text
- https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1833294f7---regex.pdfIn PDF document text
- http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094128e2416d---rexekulonunafo.pdfIn PDF document text
- http://owtsreunion.com/clients/e/e7/e717deb27d844c69ffc49b2d3c0bb1a5/File/3621370544.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=physical+properties+of+fats+and+oilsPDF 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_off000144ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x144CA	17536 bytes
SHA-256: `513db62d18ecb0bdb213375f6df3bc128acbee0ac4ee105b5c5909e55d990be7`
`font_01_sfnt_off000172be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x172BE	10832 bytes
SHA-256: `f487d4f0e8fb09cd5eed058c257d4cb8a858fa873c278a266bac2ffbe68991d2`
`font_02_sfnt_off00018bb6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18BB6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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