PDF malware analysis — malicious · 4d9ed99f54355cbb

MALICIOUS

PDF

74.7 KB Created: 2021-09-01 23:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 6e33f5b64ca33b6fcb3d0a7dfe7b7cc8 SHA-1: 1976e58515d7b59c3cb0bd9b029a50ffe6e5722c SHA-256: 4d9ed99f54355cbb175f9476e8e4ebd0ad5a9e8da7324468aa9cd2a15a43b99d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. It contains numerous links to external websites, many of which are hosted on domains that appear to be disposable or compromised, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection profile indicate a phishing or malware distribution attempt.

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.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cfe35040942---22261191171.pdf In PDF document text
- https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c3d322183be641d16886b4090b9798c3/82770865024.pdfIn PDF document text
- https://mygoaltv.org/ipp/images/uploads/files/vogetufem.pdfIn PDF document text
- http://namhungholdings.com/uploads/ckfinder/files/96327129183.pdfIn PDF document text
- http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c18e878968---lapabuxoxuk.pdfIn PDF document text
- https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/ud52j2ms3huegqsi57ngl6vvqf/funigajasumewigapem.pdfIn PDF document text
- https://mmagame.com/userfiles/file/pajizaxof.pdfIn PDF document text
- https://organicfertilizerproduction.com/d/files/53252953230.pdfIn PDF document text
- https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/8e521fc69a8ae7955b8de94d15d78d12/paliwog.pdfIn PDF document text
- http://svazekobciorlice.cz/userfiles/file/90845809689.pdfIn PDF document text
- https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/6q79qvl1ir031v911d8nqeb9n5/zalupumopofajugeriru.pdfIn PDF document text
- https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b30718ebad---91246965077.pdfIn PDF document text
- http://veraschwemmle.de/fckdata/file/76515964079.pdfIn PDF document text
- http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/p4pkaucscnbbj3eui1745ov8v6/78627936063.pdfIn PDF document text
- http://salinahighschool1967.com/clients/c/c9/c9c88be04994199279bceb128c91314f/File/41071357772.pdfIn PDF document text
- http://leguido.net/files/29441518847.pdfIn PDF document text
- http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/85610974269.pdfIn PDF document text
- https://np21bellapalermoshopping.it/file/69819998416.pdfIn PDF document text
- http://stagnesreunion.com/clients/e/ed/ed16748122b3ff8ec97113314e0446c4/File/30416113119.pdfIn PDF document text
- https://zohopin.com/calisma2/files/uploads/rarulanebiduneroxanaduba.pdfIn PDF document text
- https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/745687eba721ff41baddf5edb4ee14c7/93423724108.pdfIn PDF document text
- http://96stone.ru/userfiles/file/55136041698.pdfIn PDF document text
- http://honghuibio.com/d/files/29466861259.pdfIn PDF document text
- http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd14ee9f6e---pudogoripuwolulitudo.pdfIn PDF document text
- http://optometrystaprzemysl.pl/userfiles/file/gupemabudixupuxudibib.pdfIn PDF document text
- http://agrion.org/upload/fichier/riwabifas.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=unclosed+string+literal+javascriptPDF 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_off0000bf48.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBF48	17804 bytes
SHA-256: `b1535993043b861caf138985da8964f9fe9912ff067b3ab8394a3afcd7af4daa`
`font_01_sfnt_off0000ed72.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED72	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010589.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10589	10892 bytes
SHA-256: `134108c1b2c703fcef494ce3f7fefacd6ccab14578a3f2ff5819ce2e8ffcaacc`

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