PDF malware analysis — malicious · 903e0556aa77d48c

MALICIOUS

PDF

90.1 KB Created: 2021-07-02 09:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 50ea9dd60e2ae0860db12ecd7892ef55 SHA-1: 77eecd73c3079adc7a227381d441405268a61a04 SHA-256: 903e0556aa77d48c8d6e9e84ea5123099e679cb8f797a1afbf25545d71b53ad3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body is heavily obfuscated and does not provide direct textual clues, but the heuristic firings and URL analysis are sufficient to infer the attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079f340795a4---togozukepuxafinigobexis.pdf In PDF document text
- http://buergerforum-tirol.at/file/letapasotiwevufuxolugumes.pdfIn PDF document text
- http://bjallstar.com/upload/file/kakatovajotijij.pdfIn PDF document text
- http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fa0b1e3c5---2931702165.pdfIn PDF document text
- http://xn--80an2aej.xn--p1ai/up/file/sopafabafogato.pdfIn PDF document text
- https://tavio.ru/files/file/49060769771.pdfIn PDF document text
- http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608118a302121---8372703695.pdfIn PDF document text
- https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/lu2q7u5i2o1a4rhh9mtu2p8ni9/loxilivobekamuramugaf.pdfIn PDF document text
- https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/dvu5rmci7u9418i6ak7em0g24e/supiverazizebonevenotexa.pdfIn PDF document text
- https://ruiguoex.com/upfile/files/2021/07/02/wegagesonitezelen.pdfIn PDF document text
- http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160944d8e5d3c4---41421622555.pdfIn PDF document text
- http://www.pzkexie.com/up_files/file/32466063767.pdfIn PDF document text
- https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608898990a09b---53694991289.pdfIn PDF document text
- http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094afe446775---zalimosezenugug.pdfIn PDF document text
- http://szyldkj.com/luodan/images/userfiles/file/famavonuvexatenofaxari.pdfIn PDF document text
- http://strategie-online.net/catalogue_dynamique/file/dodemitiluraleni.pdfIn PDF document text
- https://airflow-skateboards.com/upload/file/xozokatofizawuxoxenipez.pdfIn PDF document text
- http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/afda242c439abf78714ddfc530701a60/21978874288.pdfIn PDF document text
- https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/6e3a66931b078b1120cfd14caf4d0340/18707401419.pdfIn PDF document text
- http://newdimension.su/userfiles/file/pokarijurotujogivibox.pdfIn PDF document text
- http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1a05e5060---33475091733.pdfIn PDF document text
- https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/75ed157f078776b01072e7ecac6cbe6b/7703463395.pdfIn PDF document text
- http://asckhn.com/acskhn/userfiles/file/gefobawajazedisogepum.pdfIn PDF document text
- https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/2410930qkkp8rokatgtvdolj8f/fulavelujajarizetubedek.pdfIn PDF document text
- https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160830bce62538---97374779577.pdfIn PDF document text
- https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16098e86f0a052---sotovitejasikaxesa.pdfIn PDF document text
- http://mashtalkandil.com/userfiles/file/fiwebojowazasejaxi.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=commercial+foodservice+differs+from+noncommercial+in+thatPDF 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_off0000facb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFACB	10840 bytes
SHA-256: `4f90b1262c057bf3f4f69057e917efd50cdaeddc30910cafb32786a8459f6ffe`
`font_01_sfnt_off00011399.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11399	17820 bytes
SHA-256: `6b3168b44a8d523a382a0158f06241873921d7ea37e3afe190fd9654552961e2`
`font_02_sfnt_off00014239.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14239	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.