PDF malware analysis — malicious · 6b1a1a0b746698e2

MALICIOUS

PDF

85.0 KB Created: 2021-10-06 03:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 603455953a60b88abe0451e80088f7aa SHA-1: 5c52fc6ec0cc6416f79d0987ef9e74394e12de3f SHA-256: 6b1a1a0b746698e221ddda4e40260289a9b7b37cbf009a7421ddf750b0c4eb0b

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and a machine learning classifier, with high confidence. It contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains, indicating a phishing or malware distribution attempt. The PDF's structure and content suggest it is intended to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://coretry.ru/uplcv?utm_term=chi+jack+russell+mix PDF link annotation
- https://tigapilar.com/upload/files/15578139261.pdfIn PDF document text
- http://stjconsulting.it/userfiles/files/bugawaw.pdfIn PDF document text
- https://redfortfireworks.com/ckfinder/userfiles/files/49919049276.pdfIn PDF document text
- https://atlas-consulting.ro/fckeditor/fisiere/file/nadegaketo.pdfIn PDF document text
- http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16144216387719---kelinugunakatada.pdfIn PDF document text
- https://houstoncoinclub.org/FCKeditor/file/paderelerelisadilitagux.pdfIn PDF document text
- http://inphilong.com/upload/files/titevewazitebokuguvove.pdfIn PDF document text
- http://ventss.ru/userfiles/files/72579957667.pdfIn PDF document text
- https://dunakanyarfesto.hu/ckfinder/userfiles/files/89836246074.pdfIn PDF document text
- http://kozszemle.hu/uploads/files/95925768075.pdfIn PDF document text
- http://naoshima-tours.com/images/blog/file/tekuvimamatuposezitipob.pdfIn PDF document text
- http://veganogle.es/uploads/ckfinder/files/72941477341.pdfIn PDF document text
- https://www.campacinter.com/image/upload/File/sesobajefizozikavo.pdfIn PDF document text
- https://creteservices.com/FCKeditor/userimages/file/fepesatenugulofa.pdfIn PDF document text
- http://spzpoz-zdunskawola.pl/upload/file/bovezovobotul.pdfIn PDF document text
- http://bhartiyambeohari.in/userfiles/file/venivubatazenixekiruv.pdfIn PDF document text
- http://euskararenginkana.eus/files/galeria/files/tevupidonika.pdfIn PDF document text
- http://labuchedeberce.fr/userfiles/file/28792781973.pdfIn PDF document text
- http://att-na.com/upload/savifilitorafitoxemaro.pdfIn PDF document text
- http://gzcil.com/uploadfile/files/84847276133.pdfIn PDF document text
- https://rrr71.ru/upload_picture/lamifolixo.pdfIn PDF document text
- https://techlan.pl/files/file/9584121479.pdfIn PDF document text
- http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614e71fe1c88b---jeredajagubolebigimatabew.pdfIn PDF document text
- http://www.valaisconsulting.ch/file/81748498742.pdfIn PDF document text
- https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/nedofotatujisejazim.pdfIn PDF document text
- https://noble-program.site/js/ckfinder/userfiles/files/baxivekojame.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_off0000e2da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2DA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000faec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAEC	19192 bytes
SHA-256: `04af39fa15bd525262ce38f069de860c1c63971e8f9252bcb3e4c114387b0fe9`
`font_02_sfnt_off00012cb0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12CB0	10628 bytes
SHA-256: `d6726cc8a63474e04a4f9e131738183e5ad9dea65dddb8ea0bfdaed2fc234a5d`

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