PDF malware analysis — malicious · 19943a1fbab47054

MALICIOUS

PDF

88.4 KB Created: 2021-05-21 03:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 07f7e520dee985cc5d5371658db343fa SHA-1: 7274e1f33217242b569eae5f6528932988221d8f SHA-256: 19943a1fbab470540cbe12bb2314381d2aafec6604b9862ba5d22d1f18cf91dd

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, characteristic of a link farm, with a primary suspicious URL pointing to 'kuzutuzo.ru'. The document body appears to be corrupted or obfuscated, but the presence of numerous external links suggests an attempt to redirect users to potentially harmful content or for SEO manipulation.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

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://kuzutuzo.ru/strik?utm_term=materi+akuntansi+keuangan+kelas+11+pdf PDF link annotation
- https://binikefesomeb.weebly.com/uploads/1/3/5/3/135386190/2f6eca8b17f5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4449172/normal_60360dc86523c.pdfIn PDF document text
- https://wuwawibef.weebly.com/uploads/1/3/4/6/134608234/kexisaladumimer.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4373997/normal_603e2d4c7f5d6.pdfIn PDF document text
- https://ruwuzeget.weebly.com/uploads/1/3/4/7/134755445/13db0a5f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4491945/normal_5fd86f5fcc412.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4379849/normal_5feec795b7f62.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376358/normal_6024c853c3896.pdfIn PDF document text
- https://bokosemebejira.weebly.com/uploads/1/3/0/8/130813317/winobuwalurax-xafemazirajoli-riteri.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368731/normal_60208cafc6819.pdfIn PDF document text
- https://fofawuparojimi.weebly.com/uploads/1/3/1/0/131070926/gozisiva.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4410416/normal_60473c4c35bec.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/dukavunivifa/95840109870.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c0df34f7-3e67-406a-b9b5-41716a8844ca/how_to_create_website_using_wordpress_step_by_step.pdfIn PDF document text
- https://s3.amazonaws.com/gewuwasi/epson_workforce_wf-2630_error_state.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/209bf8c6-e23f-454a-a3e2-392b4bfff52c/rijijawulojefotik.pdfIn PDF document text
- https://s3.amazonaws.com/nijosinizo/havana_cuba_trip_report.pdfIn PDF document text
- https://s3.amazonaws.com/sefipa/caballo_de_troya_libro_precio.pdfIn PDF document text
- https://s3.amazonaws.com/divikufifir/mehandi_circus_movie_in_tamilyogi.pdfIn PDF document text
- https://s3.amazonaws.com/lebaxa/bootstrap_datepicker_4.pdfIn PDF document text
- https://s3.amazonaws.com/zasepo/61019205938.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/aa33ef43-c152-4d4b-a565-c3c37cdf8397/32587895877.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5b61cc25-a6de-449d-839a-760e1f3ab43f/overlord_light_novel_volume_14_chapter_4_part_12.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fb37.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB37	3396 bytes
SHA-256: `93d070e1b264bc714b07a6229457ae4c579bcbaf8df37ad4779494d1862cd4d8`
`font_01_sfnt_off00010774.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10774	5332 bytes
SHA-256: `aad2c4aef0a637d22a799ee825aaadc34c5129a08230c754fc232f5a26c9ae2b`
`font_02_sfnt_off000119bc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x119BC	10568 bytes
SHA-256: `517a2283029bd5672a072f8e9bb1b3995be39b23587b25ce31f5235eb11fdc7b`
`font_03_sfnt_off00013df2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13DF2	16256 bytes
SHA-256: `b5f8d0bedcd16d667fc8a7755de2bfe13232a932925985cb82c8b5b6638f450a`

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