PDF malware analysis — malicious · f4c04568928adbfb

MALICIOUS

PDF

80.2 KB Created: 2021-03-16 06:19:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 9e56a0dc57dae435b806f077dba3ba99 SHA-1: 4bc486cef2e3b96e737bf57a3fcf7b93443783f4 SHA-256: f4c04568928adbfb139b0d45673bacdaba7044598da9b318fdbb026b17918d9f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains heuristics indicating it is a phishing or malicious document, with a high ML classifier score and ClamAV detection. It embeds external URIs, including one pointing to 'gimoguvi.ru', which is likely part of the attack chain. The document body, though heavily obfuscated, contains references to 'Android adb remove application' and 'wkhtmltopdf', suggesting a lure to a malicious site for further exploitation or information gathering.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 5

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 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://gimoguvi.ru/123?utm_term=android+adb+remove+application PDF link annotation
- https://static.s123-cdn-static.com/uploads/4473637/normal_5fcd53b99f90d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4413117/normal_6007906160aca.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4371786/normal_5ff6588be1672.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4411480/normal_5fecad367231b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4376372/normal_5fed4f24b797c.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/01ba6af3-ec04-4f78-a371-6439be6c9fd8/resumen_el_hombre_mas_rico_de_babilonia_por_capitulos.pdfIn PDF document text
- https://s3.amazonaws.com/julaxel/fedulaziketaguwisosaro.pdfIn PDF document text
- https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_9a483c6cb45f44bf8093d9aeef03806b.pdf?index=trueIn PDF document text
- https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_d48516d4577b402e97e6ece9d0b3393a.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/c3aa4b04-4fd6-400d-a6d0-40d5b504f796/57100221327.pdfIn PDF document text
- https://s3.amazonaws.com/mujevubutukoxu/bovobur.pdfIn PDF document text
- https://s3.amazonaws.com/mejifavo/sovifalutixeguvera.pdfIn PDF document text
- https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_1f420a79001f4c45951aa417d9a44d5e.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/jimugivos/fuketonomezuvup.pdfIn PDF document text
- https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_4ef2cb0148f949cf98dccb2882d7fc95.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/tutasujal/hummingbird_depth_finder_customer_service.pdfIn PDF document text
- https://s3.amazonaws.com/safenalavojuwu/anthem_discussion_questions_answers.pdfIn PDF document text
- https://s3.amazonaws.com/dogazisuze/soundcloud_er_fr_firefox.pdfIn PDF document text
- https://s3.amazonaws.com/julaxel/clubbers_guide_to_trance_1999.pdfIn PDF document text
- https://s3.amazonaws.com/rutufokedizon/mastering_physics_14th_edition.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a7dc1b8f-5047-446f-906e-792c0ade73d3/philips_norelco_aquatec_at830_manual.pdfIn PDF document text
- https://8dfdba76-182f-4dc4-9dda-37a8c8d09dc9.filesusr.com/ugd/4ae4db_d9210e0429784acead77f2710040da71.pdf?index=trueIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000eece.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEECE	5016 bytes
SHA-256: `310102d0106cc6e2873c62ec813d4e0274275c5ad5f50e7c75efeeccad98e37f`
`font_01_sfnt_off0000ffbb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFBB	11092 bytes
SHA-256: `2dfb464d4eb0700b0b2773b99fafeaa7a50bb97ef069b90eadb2555087cbe90d`
`font_02_sfnt_off00012590.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12590	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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