PDF malware analysis — malicious · ffde2d8b01b184c2

MALICIOUS

PDF

82.0 KB Created: 2021-03-24 14:19:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: e83fac37a1503cc6180622a453fcefd2 SHA-1: c7e84401ee76a6a3b8efcf82752e0fbf3e9237c4 SHA-256: ffde2d8b01b184c27cfd386cc061aec4e1cb33df6578a70ae13250c151c9e175

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by a ClamAV signature and an ML classifier. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or redirection mechanism. The primary malicious URL identified is https://dugedepap.ru/strik?utm_term=jump+rope+workout+chart, which is likely used to distribute further malicious content or phishing pages. No scripts were extracted, but the PDF structure and numerous external links indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 6

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.
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.
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://dugedepap.ru/strik?utm_term=jump+rope+workout+chart PDF link annotation
- http://kinokaiff.space/chinese_pattern_vector_freene1f5.pdfIn PDF document text
- http://lowufadit.scienceontheweb.net/classifying_polynomials_worksheets.pdfIn PDF document text
- http://detonic-italia.website/oh_butterfly_audio_song_freeriebj.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/a4a1bf45-fdbb-46f2-8273-8bc0675b56ba/dejadujizuwibit.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9d2a9e48-2295-4dc2-8e0c-703266bc938b/linusoxapoxuwuki.pdfIn PDF document text
- http://sujunutab.atwebpages.com/jupiter_the_bringer_of_jollity.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/394912f1-1070-4040-a7ef-f73c40a3a693/96929738795.pdfIn PDF document text
- https://s3.amazonaws.com/fajetufekejo/10812901472.pdfIn PDF document text
- https://s3.amazonaws.com/xeroguru/injury_report_packers_vs_lions.pdfIn PDF document text
- https://63a0a607-6d1b-4b95-a813-f1b07cabc719.filesusr.com/ugd/ad56f2_bbc962c0e2b44f52b5de036ab3fed67b.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/2e4c2cf1-502c-44ff-9c23-3fff7ab02879/92617243169.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8f65ecde-bbea-4988-8f4a-feb5c9eccf29/jelajexevab.pdfIn PDF document text
- https://8acf0fc4-2da8-4686-9788-d7840b5449fc.filesusr.com/ugd/fab691_27e0eee1669b4dabad67f6dda9b9e0b9.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/xozeb/majogatomazabawew.pdfIn PDF document text
- https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_71508b53088e4568abde4d6d567f4b85.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ee67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE67	4836 bytes
SHA-256: `c8e1deefe7b87c67f5f27b3eea387131dfb690169a0d9318b1ec3b3487a61224`
`font_01_sfnt_off0000fee2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEE2	1800 bytes
SHA-256: `daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e`
`font_02_sfnt_off00010770.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10770	10816 bytes
SHA-256: `d4a01cbb44bec259aad0da2ed5467ca23b2cb463774fe4707bacf8970ecbca3a`
`font_03_sfnt_off00012c74.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C74	4324 bytes
SHA-256: `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`

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