PDF malware analysis — malicious · 739b140b1b5f0aa0

MALICIOUS

PDF

79.4 KB Created: 2020-11-11 22:59:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04

MD5: a8df7d9db9a8a55a11dba631342ec780 SHA-1: 16847f1e4e88f74ec9dea62aaf2692ae3b132e6d SHA-256: 739b140b1b5f0aa08fe03b2278d884ce4beec10e5012a2e70a7f07a1a90cd487

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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://trafffe.ru/strik?utm_term=back+in+black+flute+sheet+music PDF link annotation
- https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/jibepare-vudaramuzi-refirezagulele.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367312/normal_5f88297193e89.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368501/normal_5f877e5534758.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4412887/normal_5fa57d6eef704.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372696/normal_5f89261a7970d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416513/normal_5fa75ed884117.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368503/normal_5f9ab858b6ace.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372985/normal_5f91618b3e318.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4488322/normal_5fab7a2d80314.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/9bfb7b18-40ea-4ff1-bb53-a8d8307b19f1/arrl_handbook_2018_download.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3c64c2af-532f-40e5-a8cd-7de515968ec5/la_separacion_de_texas_causas_y_cons.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8e27f8a3-9fe9-4ffe-a9dc-6870d69d8803/swtor_rage_juggernaut_guide_6.0.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a26e8158-9f61-4b61-8d09-1937e294d8cd/wisopuludevixev.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4e50441b-4b8c-4488-84be-f20826697f86/wulavawodasomatapi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/444f8c4e-84ba-477c-98fd-37db013a4a62/jidakigubaxefamumodakuvu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b51c2ff2-732a-4ed8-92d4-b5bd8d527976/nabumapukinimoxera.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_off0000e3db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3DB	5276 bytes
SHA-256: `7ec1cb173f2d612f951ee0a8930c4e879263f4e5400abac58c80a5408b6872eb`
`font_01_sfnt_off0000f5b5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5B5	11252 bytes
SHA-256: `80947f5e9965117fe2ca2bce89632d718775a251020aeee8b2cebce2b8d6f6f3`
`font_02_sfnt_off00011bc5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11BC5	16100 bytes
SHA-256: `84650fe671c70ac66f3af0994468c9b9feb42d01905b0f030d5781e095ef8e52`

Open this report in the interactive analyzer, or submit your own file for analysis.