PDF malware analysis — malicious · 2f9e93703c4e87a9

MALICIOUS

PDF

88.6 KB Created: 2021-07-17 20:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 45f53e519fa7e644a3e176b47af52e23 SHA-1: 7b6af5156dc2bcb1ce32445d221c75df2c0a76ef SHA-256: 2f9e93703c4e87a9a2e3a5184575162a2e52cf71ea09f152eebb1463fb7238b7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a link farm pointing to compromised CMS upload storage, suggesting an attempt to redirect users to malicious or phishing content. The presence of multiple URLs on compromised sites indicates a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/l4c94gngrvov7pc28eb4jgfl0m/gabawexuluruw.pdf In PDF document text
- https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/lt2f35e0ckpouecf77ojklsbf4/62269746489.pdfIn PDF document text
- http://etre-belle.su/images/file/mujakifuxaziruvepulemoba.pdfIn PDF document text
- https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/svss324b5hnogc9tvt3nh9g02d/telutezifibur.pdfIn PDF document text
- https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/86a25eb8b983cfb5c3feeb407e47c8db/37965387471.pdfIn PDF document text
- https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce6fd16f38---jisojexizimazifor.pdfIn PDF document text
- https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f119fe7d8d1---45395577744.pdfIn PDF document text
- http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099e607b7ec3---74737681081.pdfIn PDF document text
- https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/52ca7595ee67f963f8c1b118260096e1/47473548669.pdfIn PDF document text
- https://mut-zur-veraenderung-hambuch.de/userfiles/file/gufasabexafanosivinugim.pdfIn PDF document text
- https://champion-osk.pl/userfiles/file/85657118887.pdfIn PDF document text
- https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/1e00bccd3a3666705349fd6e15d48308/gojewedilufotimavovu.pdfIn PDF document text
- https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/bq84altsgmgpcdmlovs4vrkjv4/89477675910.pdfIn PDF document text
- https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce84f2d3c6---18507065968.pdfIn PDF document text
- http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083ec783f212---zuliweribizi.pdfIn PDF document text
- http://rolfingnaples.com/clients/a/a5/a5422f62036d2d393d866963e902351c/File/75794264083.pdfIn PDF document text
- https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091a734c6151---70335764448.pdfIn PDF document text
- https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/83124cf5ebba79ee8858c027ff43e1ae/53839612001.pdfIn PDF document text
- http://soepcentrale-dekeyser.be/userfiles/file/lakifubilinetibajemigedik.pdfIn PDF document text
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074ca722cfca---jivoresinaleguzolujevi.pdfIn PDF document text
- http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086554a379aa---59526681548.pdfIn PDF document text
- http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/bafadoboxevetotawatu.pdfIn PDF document text
- https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/tr8t4tdeidmpsike241c33cbeo/65325014275.pdfIn PDF document text
- https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecd7bedaf0---84469648548.pdfIn PDF document text
- https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/0cj4b7b9h1838h35rb7eh6r8t3/dobevurexexazilegutusir.pdfIn PDF document text
- https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/b0fffad519ad68073be62163b023ec97/7147021255.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=download+one+box+hdPDF 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_off0000f6cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6CB	17916 bytes
SHA-256: `3fcbc773d175d8021874a4148468c19838c9778ae6113fc34bc0c95fe1738eb2`
`font_01_sfnt_off00012649.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12649	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013e60.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13E60	10216 bytes
SHA-256: `05867df3425ac42c92f16e87031a8b922487ca9b5a23a00d510dad04da235ece`

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