PDF malware analysis — malicious · e17e7ab863759a07

MALICIOUS

PDF

81.7 KB Created: 2021-03-29 01:36:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e83a424b176268e74caf72b62bec3359 SHA-1: db450376c97f9fcbec0e35e19f512003987c9afb SHA-256: e17e7ab863759a07e8241249c214227add6cf683dc08bfe7f1885141a9c47eb3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' containing 30 external links. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 5

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://xezojetit.ru/123?utm_term=space+invaders++ipad
- https://fewojejano.weebly.com/uploads/1/3/4/3/134348079/3359457.pdf
- https://jidedenevunuva.weebly.com/uploads/1/3/4/4/134498736/2895456.pdf
- https://simepatu.weebly.com/uploads/1/3/4/2/134267103/burexomor_nadutigugo.pdf
- http://zogometemo.sportsontheweb.net/37803771333.pdf
- http://fitatuvepejozo.sportsontheweb.net/95294769352.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://3c199e1c-ff83-4553-a351-db1e9419129c.filesusr.com/ugd/424a74_0ece2c443744483cb744dec5670bb9f9.pdf?index=true
- https://05efeaee-ea5b-4dc8-bddc-a5098cc0dcbd.filesusr.com/ugd/c06c30_2681dc2e99a64fbf805a9a65c1f8eb67.pdf?index=true
- https://uploads.strikinglycdn.com/files/c294abbd-c453-476f-adb8-10cdc5110e14/mclane_edger_repair_manual.pdf
- https://3b044092-e341-4c69-a8e2-52b14fc1865f.filesusr.com/ugd/370021_7768756e6ef14ba686840b0bb3d3c938.pdf?index=true
- https://fa3f2985-242d-4a4c-93c0-6adbfb259eaf.filesusr.com/ugd/8dbe7a_a8db943b39e941ab8d8f772b8477cf80.pdf?index=true
- http://bepolujogox.atwebpages.com/what_are_the_big_data_applications_in_management.pdf
- https://uploads.strikinglycdn.com/files/3f21e784-66f7-4647-8cd5-3d67cc672654/how_much_should_a_lawn_mower_repair_cost.pdf
- https://uploads.strikinglycdn.com/files/b081d21d-6982-4b7f-b1e8-0744d7463a44/how_to_reset_hp_laserjet_p1606dn_printer_ip_address.pdf
- https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_53ae0a141c804d2aa1cf76b924265464.pdf?index=true
- https://uploads.strikinglycdn.com/files/9e7975d1-7a93-4ee8-8f2e-b1467563f1e4/12967886188.pdf
- https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_60e8e96a03884342ae3c35241629a2e1.pdf?index=true
- https://uploads.strikinglycdn.com/files/3ad43211-d5d0-42f8-be45-2ef3460942e9/sixilileboduni.pdf
- https://uploads.strikinglycdn.com/files/d9b3d069-eb04-4b81-9248-10670618bdc0/1959_johnson_seahorse_10_hp.pdf
- https://uploads.strikinglycdn.com/files/2c465d7d-3380-487f-b16e-7467cf872bb5/what_protein_to_eat_on_alkaline_diet.pdf
- https://uploads.strikinglycdn.com/files/639625b9-6345-4747-ae22-3aa6fc2f7f6b/milasodup.pdf
- https://uploads.strikinglycdn.com/files/26f9290e-7234-4249-955c-09948fc21fc9/target_black_and_white_christmas_decorations.pdf
- https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_d8d01be3d98249c1b8fe699f39ce5a11.pdf?index=true
- https://8a6b9437-e7f2-49d7-8c24-351b272aa67a.filesusr.com/ugd/b18e4d_8a65c1a0a8ff4470aa43ac4665d2d49a.pdf?index=true
- https://d926c97b-7f3b-4ec8-a52a-318bcb589338.filesusr.com/ugd/120f26_9cdc4805e1c04624ab56ecdebd2880a5.pdf?index=true
- https://uploads.strikinglycdn.com/files/a8c17a0c-9d46-4401-8394-2cabee6f18ad/1992_dodge_dakota_transmission_rebuild_kit.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f2ae.bin` `707f044220626673030db1e929683b7e6be6df4515348478205ae719871ec17a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2AE	3312 bytes
`font_01_sfnt_off0000fe90.bin` `89eaaebdf987745101530ac5c87edb677c0a2a56495cfb052a891be784fc4a2d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE90	5196 bytes
`font_02_sfnt_off0001104a.bin` `5d7f7777f7d87ae76a12862b94f18d8ef9a055f04e887e6cb48461d0cc06e3f9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1104A	11968 bytes

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