PDF malware analysis — malicious · b97666de5ce42c2a

MALICIOUS

PDF

83.9 KB Created: 2021-08-08 01:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: c55d3ebe8b1bf07281320462fc8dbfd3 SHA-1: 2a27a31c43941173e6a99713faa1f310e828f6a5 SHA-256: b97666de5ce42c2a355c579695c0ec198aae108bcbc52df1124bde6d799b8ea3

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection attempt. The ML classifier strongly indicated maliciousness, and the structure aligns with a link farm designed to distribute traffic to potentially harmful destinations. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

Nyx PDF Classifier malicious score 0.9934

Heuristics 5

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://studiofantino.it/userfiles/files/xizezuvujebepopar.pdf In PDF document text
- http://pospatrans.cz/UserFiles/File/foxezojosubage.pdfIn PDF document text
- http://perfekttorun.pl/pliki/76712480285.pdfIn PDF document text
- https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/549e8e044179266697100e5b6e2d5352/zevedesodogopejulonis.pdfIn PDF document text
- https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/c59f1a51496689142838e5b142fceb63/dexisenavixaguruv.pdfIn PDF document text
- http://sanphamhanquocymy.com/uploads/files/47096647029.pdfIn PDF document text
- https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6479fddbdcae046dda469b800b525486/97520761412.pdfIn PDF document text
- https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/6fef8030f2b0aed3e20a2f75df2e4bef/xomusipevugivosadexufev.pdfIn PDF document text
- https://ratsimae.eemedia/contents/file/sapulasuwubus.pdfIn PDF document text
- http://alnadaoil.com/userfiles/file/87424467119.pdfIn PDF document text
- https://zivotzaokny.eu/res/file/gojasimo.pdfIn PDF document text
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607695c2cd9c6.pdfIn PDF document text
- http://huntland.hu/upload/file/70384945303.pdfIn PDF document text
- https://cedria.es/DOCUMENTS/FotosFCKEditor/file/33808240798.pdfIn PDF document text
- https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/i9llruhapgubu72vupnr8ccftd/vufafajiwalawoxusibapuni.pdfIn PDF document text
- http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/c0a4aa5d416f18d73042ae7279eca6bf/59866687062.pdfIn PDF document text
- http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16076368a638bf---16249579379.pdfIn PDF document text
- https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608df8ce98c04---godujumexaloxukorexakomat.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3b2ea00a02---ranulotigosol.pdfIn PDF document text
- http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cc73d27a5ed---xigojifaluzanexipakivodom.pdfIn PDF document text
- https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e088b1ebe---69571645728.pdfIn PDF document text
- https://0800-707-808.com/upload/ckfinder_temp/files/20210808032906.pdfIn PDF document text
- https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/f7e7514b6138ad5ebff23e7476491d5a/90079494081.pdfIn PDF document text
- http://cerrutistudio.eu/userfiles/files/50752702509.pdfIn PDF document text
- https://alakharia.com/public_html/userfiles/file/laxosalesupijiv.pdfIn PDF document text
- http://www.alfapilates.pl/upload/file/22855587394.pdfIn PDF document text
- http://gpshardorawal.com/hemkunt/userfiles/file/pisogim.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=para+que+sirven+las+plantillas+en+informaticaPDF 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_off0000ded2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDED2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f6e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6E4	18268 bytes
SHA-256: `949fc30ec4cfd40deba3083fbd67d5a6186bd444c9afb07167383c576043220a`
`font_02_sfnt_off000125cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125CB	10952 bytes
SHA-256: `81c1e677ed8fae6aba5d6aabda52615fb4eba4c9817538bbd6cbfb8799649d24`

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