PDF malware analysis — malicious · a810a38c7a588437

MALICIOUS

PDF

65.3 KB Created: 2020-12-19 08:03:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 4bcbc8668522465ae4d378c896acca48 SHA-1: 816c90bf3d53791fd3072a8a5888ad696c35c7b7 SHA-256: a810a38c7a5884379faac2647ece9b52fb4b335ec012832615a58799b219e01e

104 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 presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9979

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
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://trafficel.ru/123?utm_term=respiration+worksheet+for+grade+7 PDF link annotation
- https://cdn-cms.f-static.net/uploads/4415065/normal_5fada48675c58.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418399/normal_5f97dd7823851.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4373526/normal_5fd335f329702.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/bejenosugede/gana_achu_laptop_song_free.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/11bddcda-de9f-430f-aa1c-c35bd4211abf/resonance_energy_transfer_definition.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ef798a1e-2f28-437d-a97c-e34d9ba370d5/jomagefizopijufidasijepi.pdfIn PDF document text
- https://s3.amazonaws.com/wilugugo/hong_kong_disneyland_map_download.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9c5146b3-ce43-4c9f-a177-b280a41aab23/fapilowesewejewolebokof.pdfIn PDF document text
- https://s3.amazonaws.com/petikamov/android_tv_os_apps.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c310.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC310	5512 bytes
SHA-256: `daaeb86a2c3d0f328e24eb7c5f0b4ab2bb38d10034b51340547863ff181ec9c1`
`font_01_sfnt_off0000d5ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD5EA	10364 bytes
SHA-256: `d797884616e34c3960d9cdc1495d8df840a690bb7cd8a277e70e0f73ccbe5dc7`

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