PDF malware analysis — malicious · 812ea066a4540f27

MALICIOUS

PDF

34.9 KB Created: 2020-10-11 14:37:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: 693b5db96a7995a6b9885b5c6822cf55 SHA-1: 6a818dfd82b2eaffe6c6f99dbd269057aedfd98c SHA-256: 812ea066a4540f27333f11d6df409002049da9e196bf91f69132ff31791bba9e

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing indicating a malicious redirector link. The embedded URL points to a known malicious domain, suggesting an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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://cctraff.ru/strik?keyword=letras+de+febrero+para+periodico+mural In PDF document text
- http://files.ocbackgammon.com/uploads/1/3/0/9/130969080/sofef.pdfIn PDF document text
- http://womopitob.memorablemomentsbymichele.net/uploads/1/3/0/7/130738884/fasimofoxo.pdfIn PDF document text
- http://files.ledamark.com/uploads/1/3/1/4/131438784/bamulivo.pdfIn PDF document text
- https://site-1037233.mozfiles.com/files/1037233/58517425778.pdfIn PDF document text
- https://site-1042359.mozfiles.com/files/1042359/78344882330.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/23f13816-3577-4dfa-8b74-4e7ef5a18101/lokaxirosusoma.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3bd898ca-c286-4928-95f4-8a2031b1440a/padonilisopare.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1bb25588-8d7a-4b60-925e-1d47bcd1c7c3/lifexofujokarusile.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f3faa5c4-cc28-4943-8434-87495a230159/76130055242.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0477/5562/4604/files/fejezanugazisiwopafa.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_off000047bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x47BF	5384 bytes
SHA-256: `2f5d383cdc637698b4c13249f1968da4f6d56f47d08377c16ad1fa56ed3ceaba`
`font_01_sfnt_off000059ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x59EF	10972 bytes
SHA-256: `ca4d36852f8059c32b011f5a37134552e2c49c61af8ed7da422ef3862814910c`

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