PDF malware analysis — malicious · e94f4f00f9fde872

MALICIOUS

PDF

83.9 KB Created: 2021-09-05 13:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: abdc1968b759b1390d1f55cb99b2e33c SHA-1: 59c0ab6e50d243c5214483d52c5fec79664cd43b SHA-256: e94f4f00f9fde872c7815d35a9209534e16dbd9c828239884cb4755741ee50c9

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to host or distribute further malicious content. While no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards a phishing or malware delivery mechanism.

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://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/442ef72fe50eb871884b144c33389515/73141530239.pdf In PDF document text
- https://wedding-photos.cz/userfiles/file/47191329863.pdfIn PDF document text
- http://autobedrijvenindex.nl/images/uploads/zuwenirolavepokizukegupa.pdfIn PDF document text
- https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/m89ier9vanq80iealppj4b3vjb/74319059550.pdfIn PDF document text
- https://telewebmarketing.com/FCKeditor/file/vijedaxorojamijiw.pdfIn PDF document text
- http://ekachaiguitarist.com/ckfinder/userfiles/files/6579476938.pdfIn PDF document text
- http://kowalstwwo.pl/public/cms//images/file/veruvawadak.pdfIn PDF document text
- http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fe42b01ed7b---fejek.pdfIn PDF document text
- http://iccarrentals.com/files/file/51591485521.pdfIn PDF document text
- https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/8f5gb38o1u0e836ibmdlpkqafq/sowefigotijusijaraxusa.pdfIn PDF document text
- https://computerzone.pk/file/99015873648.pdfIn PDF document text
- http://constantemails.com/userfiles/file/1623688905zupojoz.pdfIn PDF document text
- http://pinxedien.net/upload/files/pojup.pdfIn PDF document text
- http://krevue.cz/UserFiles/File/nidudufoguvizumozifi.pdfIn PDF document text
- http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/78lps6u88f1ltnia4abprk4sa4/tipujujetu.pdfIn PDF document text
- http://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/87638539503.pdfIn PDF document text
- http://geteffective.biz/uploadfiles/file/68706989196.pdfIn PDF document text
- https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160871cc9299bb---nipogu.pdfIn PDF document text
- http://gokea.org/upload/editor/files/vorekedajananarozetubowe.pdfIn PDF document text
- http://basyapiemlak.com/yukleme_klasoru/userfiles/file/8399886103.pdfIn PDF document text
- http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611d038409114---zilofirepi.pdfIn PDF document text
- https://ville-saintleonard.fr/pdf/83429131934.pdfIn PDF document text
- http://asesorgubernamental.com/images/file/nakopevana.pdfIn PDF document text
- http://tz5168.com/uploadfile/image/2021/08/19/file/20210819_051143_157.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=genetics+pdf+bookPDF 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_off0000ddde.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDDE	10576 bytes
SHA-256: `341206ec082b27275379474dfe13d9fcc5891b42cb957dfd3cb65178d344b597`
`font_01_sfnt_off0000f5ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5EF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010e01.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E01	20408 bytes
SHA-256: `ffba408a7c3fe3e0bcbb7652c1d6eaa8db2e45505e1543b3950055dd51dd946e`

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