PDF malware analysis — malicious · 65ce4deba5281d80

MALICIOUS

PDF

48.2 KB Created: 2020-10-16 00:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: 407e75af410f74c5d6f3854928909d45 SHA-1: e20dcf23e04aaa616e7b5e951c3781a12c939024 SHA-256: 65ce4deba5281d807799f418c005771b3614d5dc6774368ac555be27153829b1

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a large number of embedded links, many of which point to disposable hosting services, indicating a link farm designed to distribute traffic. One of the primary links directs to a known malicious redirector, suggesting the ultimate goal is to lead the user to malicious content or malware. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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.
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://cctraff.ru/strik?keyword=asmaul+husna+dan+terjemahannya+pdf In PDF document text
- https://site-1042992.mozfiles.com/files/1042992/2462758423.pdfIn PDF document text
- https://site-1036725.mozfiles.com/files/1036725/kapelesuwosofexuba.pdfIn PDF document text
- https://site-1042556.mozfiles.com/files/1042556/81876207271.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365656/normal_5f87fff96dcab.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371790/normal_5f88a8f9c221d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365608/normal_5f88bedb7ad51.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369638/normal_5f888d09f2bcc.pdfIn PDF document text
- https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/c13a2c1.pdfIn PDF document text
- https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/zosorunoremuxuza.pdfIn PDF document text
- https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/foburadip.pdfIn PDF document text
- https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/53d96a82ec396.pdfIn PDF document text
- https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/46342becd04fce3.pdfIn PDF document text
- https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/ff06dfdf.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/5392d23c-36b6-4fce-8d43-0013a31fd701/85683284945.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8b3fbae9-93b6-4554-9f94-db332011995e/joniko.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5fe3f324-3b71-4110-a69e-c09208a66420/34044487546.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ef664400-7bfe-4083-9ac8-5362b89318bc/tawurafadajabu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2cef4db6-65b3-441d-b164-ce52ee840617/bomokawugubipaxamu.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://scripts.sil.org/OFLIn 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_off00005fab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FAB	5448 bytes
SHA-256: `db2c050af7a1acd902a68e851a9857c6f789b0c91278cb489e718cd296b6a3ac`
`font_01_sfnt_off00007217.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7217	9824 bytes
SHA-256: `b8de67703e755f3439e90d34bf5506f29ab04bbfcdc0878b560c81e0bf919d70`
`font_02_sfnt_off000093dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x93DC	19268 bytes
SHA-256: `a289c8b0d0d7ca5b62c4f7589739f2328ff191cc224d5fda131cdfe02c768a3e`

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