PDF malware analysis — malicious · 187f8a485ac9d4bd

MALICIOUS

PDF

78.0 KB Created: 2021-07-16 00:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 395e85c94120a5b3347a07278a1ed4d1 SHA-1: 3af4b17bcc19c6038e7dd1496d2d25ba3e5c6464 SHA-256: 187f8a485ac9d4bd72d0b3d648b128b48a04344d99bf61639bc3519640a4245f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to websites hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to leverage compromised infrastructure for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9829

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://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/e2gvh8fdjuof20hapi6fmafg53/zirure.pdf In PDF document text
- https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/vrm4e01bguc24avtfg12tqk0qi/70427479413.pdfIn PDF document text
- http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/9257f10ff13ce946d401cc102f49044b/52266432716.pdfIn PDF document text
- https://glbtrader.com/userfiles/file/81235952693.pdfIn PDF document text
- http://bhk-aindling.de/userfiles/files/70464836919.pdfIn PDF document text
- http://aarogyamedico.com/userfiles/file/32571266497.pdfIn PDF document text
- https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/0953ebafe91514258694f2628e3bdd91/piluzu.pdfIn PDF document text
- http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/xewaziwelakirirozowubeko.pdfIn PDF document text
- http://kapsalonvogue.nl/files/file/59838154590.pdfIn PDF document text
- http://prinsart.ro/uploads/files/govigovanekedetip.pdfIn PDF document text
- https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/hl8j7frfh52pnrnh3uvar3idq0/1617978151.pdfIn PDF document text
- http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9dbf0fcc0---ximevuxabajepifomanasire.pdfIn PDF document text
- https://baohohoanglong.com/userfiles/file/rukifafasizefowijosazi.pdfIn PDF document text
- http://asianmosaicnyc.com/userfiles/file/suvunogubepijadogo.pdfIn PDF document text
- http://hodori247.com/uploads/files/rigofapapalipikoviwa.pdfIn PDF document text
- http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/2fooj8uacskb78uaujr4f696gj/bubifosu.pdfIn PDF document text
- https://ijpdua.com/contents//files/rabizadusoremusigumuw.pdfIn PDF document text
- https://summit-christian-academy.org/scauserfiles/files/robof.pdfIn PDF document text
- http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ccd1da5bc---38795312774.pdfIn PDF document text
- https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/58e001f895d84356e7370b8974eba0a5/63303173470.pdfIn PDF document text
- https://prawobrzeze.info/userfiles/file/7294659866.pdfIn PDF document text
- http://htk2.altrodesign.eu/ckfinder/userfiles/files/pipatoxiburidebavusuw.pdfIn PDF document text
- https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/499966be50ef03658d379b97812df791/suwifowufizininilozodewu.pdfIn PDF document text
- https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/8fed1d643f3bbeb2ef9e529cad3484d7/30716659678.pdfIn PDF document text
- http://rld-carbon.ru/file/53582952767.pdfIn PDF document text
- http://abwplazaview.com/uploads/files/1758663859.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=jessie+ware+say+you+love+me+listenPDF 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_off0000cb2f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB2F	18480 bytes
SHA-256: `2df6c02ae4a920d63b144476d5cb47ff151266394024bd1074d55eb9a62d8db3`
`font_01_sfnt_off0000f9f5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF9F5	10624 bytes
SHA-256: `14fce265cc76adb1bf3dbd81baace7b47ed8bc4953fb38ffecd1553564c43634`
`font_02_sfnt_off00011261.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11261	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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