PDF malware analysis — malicious · bfb07920fbf05137

MALICIOUS

PDF

90.2 KB Created: 2021-06-30 08:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: f992531e92be71097a81e34d8a3c9b22 SHA-1: 60a4e717e5cf063465b4f0ac93a764590535fd37 SHA-256: bfb07920fbf0513792bdd7d0000e4e04042aae4d204c4a51a15dd7b966c7d4c9

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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://allytemp.ru/uplcv?utm_term=movement+and+shift+of+supply+curve PDF link annotation
- https://clinicamanila.com/ckfinder/userfiles/files/24151771788.pdfIn PDF document text
- https://rumahbaruku.com/contents//files/30435461817.pdfIn PDF document text
- https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/cc3473cf548ccbd7eb2d75edf2a41ca0/47237864195.pdfIn PDF document text
- https://vieiras.pt/imagensprodutos/file/giwisoralexuj.pdfIn PDF document text
- https://aawyx.com/sites/default/imageuser/file/85419186986.pdfIn PDF document text
- https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/17160cdd240750b3806c903ffac61331/jogiti.pdfIn PDF document text
- http://quinta.cl/upload/files/gonubifasikufinutowesi.pdfIn PDF document text
- https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/e8b612d0bbd7b4c0e3f7ec9abe6ddfca/fedot.pdfIn PDF document text
- http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160767cfbe68cb---xalugebitatami.pdfIn PDF document text
- http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080d1827aa72---suwasewikoremefumitubo.pdfIn PDF document text
- http://tajesink.com/Uploadfiles/files/34846900058.pdfIn PDF document text
- https://espiber.cl/images/uploadedimages/file/22147320827.pdfIn PDF document text
- http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d61fe61b8---51647377897.pdfIn PDF document text
- http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb662a3e57---tozenozolavozan.pdfIn PDF document text
- http://xlsferrosilicon.com/d/files/880696322.pdfIn PDF document text
- https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/ito63amedrrrrnjlitcdi6ii1k/92342716275.pdfIn PDF document text
- 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_off0000fd11.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD11	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011528.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11528	11156 bytes
SHA-256: `adde1962cbd424cd1e1e19ab6966ef25b7bc78a18c0b358e46b9f024c42d8acd`
`font_02_sfnt_off00012f0e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12F0E	17156 bytes
SHA-256: `c4796dcdbe245eaac2697ea409f5b1096e6b1f2f6f9cd17b05fc776e0bbe9d7e`

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