PDF malware analysis — malicious · b594f185ee429489

MALICIOUS

PDF

91.7 KB Created: 2021-06-30 09:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: d8a6eec613c8e4dfeeb3af38d1a17327 SHA-1: c2f07ff89903662cfee6ca6f796ab49df34baead SHA-256: b594f185ee429489979566faeb987ff0b9d4c86637d5a58f869e9ceb58f0d8f6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to distribute malware or lead to phishing sites. Although no scripts were directly extracted, the PDF structure and link farm heuristics strongly suggest it's part of a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfa127c92f---kifosadobebodazejitozi.pdf In PDF document text
- https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf332bf65a---goxexadab.pdfIn PDF document text
- http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea72d60a74---fuvumerolifesokiselet.pdfIn PDF document text
- https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/33gi4kcl7rc44vrantesdptok0/58638186103.pdfIn PDF document text
- https://unserbiokorb.ch/userfiles/file/fekevapiboselivupobiwatox.pdfIn PDF document text
- https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/fcd1898ac4cfdcd39fedee1abad7f119/91050574777.pdfIn PDF document text
- http://brooklynsmokeshops.com/admin/images/file/nodadapinemufijewogaja.pdfIn PDF document text
- https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f68a7f20da---5239480251.pdfIn PDF document text
- http://loaamtran.vn/files/usersfiles/files/94663210491.pdfIn PDF document text
- https://bangprice.combangprice.com/beta/cms_image/file/rovopepajo.pdfIn PDF document text
- http://goldenteriyaki.com/uploads/files/1417857691.pdfIn PDF document text
- http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/fkenr3jptgdqvbaq595t0t2n30/35550855711.pdfIn PDF document text
- https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607058258ae69---66889169280.pdfIn PDF document text
- https://jamurgoreng.net/contents//files/6998934265.pdfIn PDF document text
- http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782fa2c4779---68428963523.pdfIn PDF document text
- https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/5665bdaaf3e6dad219602222dc8caf56/96502758199.pdfIn PDF document text
- https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/cda148ba91c7b66e4b87a87945c072ca/72684294567.pdfIn PDF document text
- https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/5642q429hom487kbmmuel1gfm8/nikidisemaxetugowabedi.pdfIn PDF document text
- http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d828d478541---73753011578.pdfIn PDF document text
- http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0444173ef8---32977380300.pdfIn PDF document text
- http://ekachaiguitarist.com/ckfinder/userfiles/files/vojevutozikuwugamotaga.pdfIn PDF document text
- https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/901b4feef5dbf2db2bc2a47c5a379a8a/35683905727.pdfIn PDF document text
- http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085d66a293f4---79745937002.pdfIn PDF document text
- http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/3001fa68a33525d838cb25aa288d1429/zuzolugonoxegasuvibotip.pdfIn PDF document text
- http://simonide.org/userfiles/file/92203563393.pdfIn PDF document text
- https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc55373559---72012827981.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=eighth+judicial+district+court+portalPDF 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_off00010388.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10388	17264 bytes
SHA-256: `3b34c7c839a3eadfa450489aea7c149fc21af41dd2dfc1b360791758f033f9a6`
`font_01_sfnt_off000130b7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x130B7	10768 bytes
SHA-256: `abbb9e9777abc7aa2dd8d39761081e8d7130042b92dacbbd32c3e8267860ed83`
`font_02_sfnt_off0001495e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1495E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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