PDF malware analysis — malicious · 44f2b9b0514fe973

MALICIOUS

PDF

41.4 KB Created: 2020-10-20 22:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23

MD5: be6909c8af2f037293270cb562a8664f SHA-1: e2577859dc1a4bb6b2b38092f4c2d031372b91ca SHA-256: 44f2b9b0514fe973bc8405786fbb6ffcebe42db47fd011e7c2b314fbdedb4e18

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a significant number of embedded links, identified as a link farm, with the primary URL pointing to a known malicious redirector. This suggests the document's purpose is to lure users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
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.
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://gettraff.ru/strik?keyword=birey+a+matematik+%25C3%25A7%25C3%25B6z%25C3%25BCm In PDF document text
- https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/tazixusimidun_zozagipaka_nikorib_mufatu.pdfIn PDF document text
- https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/sikutaxudeza-zinilekesoga-mowuwag-pazewosugem.pdfIn PDF document text
- https://gadigode.weebly.com/uploads/1/3/2/6/132680949/lodajedaxape_jerewavedu_waxitiges_gimugexufod.pdfIn PDF document text
- https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/5245467.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368972/normal_5f8a53fe15108.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4384839/normal_5f8eb6d4ae3a7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372100/normal_5f893039be615.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374364/normal_5f8b8ec586fea.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393346/normal_5f8ebd35b3721.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374860/normal_5f8ca9be33373.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369645/normal_5f8803decb441.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/henghuili-files2/fowirevowujavezugela.pdfIn PDF document text
- https://s3.amazonaws.com/memul/pujotadepuxiwutefapan.pdfIn PDF document text
- https://s3.amazonaws.com/wilugugo/83876863104.pdfIn PDF document text
- https://s3.amazonaws.com/memul/43693066137.pdfIn PDF document text
- https://s3.amazonaws.com/zetare/8357733415.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files/29818706043.pdfIn PDF document text
- https://s3.amazonaws.com/memul/wibusudoj.pdfIn PDF document text
- https://s3.amazonaws.com/wilugugo/vuwosezatezopizegef.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/77032402-ea5e-489c-a68d-251f98720256/39460857876.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fdabdc39-2797-4113-be64-7cd0e7ac86e3/ropebozovof.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4219012a-1fa6-488d-aa9d-2f1022dc88dd/libro_fundamentos_de_investigacion_p.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/868a5679-329d-4bcb-9964-971ff0254a48/xuwiraneravurolab.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005530.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5530	2960 bytes
SHA-256: `ba9dd86ad06677ef82b9fc66565cbe1db364e5caa8fb73f24ce3e10b7ab9a08b`
`font_01_sfnt_off00005fb3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FB3	5324 bytes
SHA-256: `be39b4b5b01ae926ab4d73af775162a3e44140a4205d495c7d3705b33488fd20`
`font_02_sfnt_off00007151.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7151	11536 bytes
SHA-256: `f21b612afa820a80e0ce49b3c04441dd8b8cd6088ec8b9c14fa9f14d89e9ed21`

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