PDF malware analysis — malicious · 18bad14f55d78e31

MALICIOUS

PDF

118.4 KB Created: 2021-06-01 06:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07

MD5: a704959b768db3a2c5e7d26f41b85581 SHA-1: 5d6fcb0fd85f7b64e52c840d45cbc8538e1a788d SHA-256: 18bad14f55d78e318e510241b578cdfd95df561ca752528341fa0ebd6c782c5e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, flagged as a link farm, with one primary malicious URL identified. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

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
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://chcial.ru/pbw?utm_term=mahaprabhu+sri+chaitanya+colors+bangla+serial+song+download PDF link annotation
- https://static.s123-cdn-static.com/uploads/4479705/normal_6003391374589.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4469623/normal_5fcc8447b37cc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4457839/normal_600b3f500e8cb.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4474719/normal_5ff662aa2fb4d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366331/normal_605f72f7d5d33.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495973/normal_602b5dd409585.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387219/normal_60551c70bbf6f.pdfIn PDF document text
- https://kanemonel.weebly.com/uploads/1/3/5/3/135319287/a13f6bbe.pdfIn PDF document text
- https://befadileniralan.weebly.com/uploads/1/3/6/0/136082268/3529186.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/fd9453c5-e3c7-4fac-ba9e-f4234d33d7fb/80263863587.pdfIn PDF document text
- http://wuwazilizos.pbworks.com/f/41261868018.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ab7b6339-abbf-4fa4-9f71-214481669df8/99367701740.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3473b463-7c05-4828-95ba-f15bcb69ba31/sezunalakasimesumapu.pdfIn PDF document text
- http://bofamawetodo.pbworks.com/f/que_significa_sonhar_com_a_cara_desserto.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/96622f6d-ad9c-46fa-87b4-28b4087841ff/melarisiwuzebotedad.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e67853ba-62ce-4dac-9347-690fc28e92cd/what_are_the_order_of_operations_in_excel.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/09f1921b-f0ac-48c1-a5c9-7836d5f9e90b/how_to_clean_bissell_proheat_2x_after_use.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ec7ee2c3-e039-40c4-9e25-1391374d0ef4/minecraft_bookshelf_layout.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
- http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0001559d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1559D	5676 bytes
SHA-256: `875ac4a426b136aa0d376f3583b05e9fc4688181da969f1f55972a5672e4f3ae`
`font_01_sfnt_off00016902.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16902	6024 bytes
SHA-256: `ca603ac12245db54992ea2f6339d234de58b8fa0d01bb4d9358ffeb6dd9bb8e2`
`font_02_sfnt_off00017c6c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17C6C	1908 bytes
SHA-256: `3f842c02fbac7cdf8e596d5ac77d08a6055a5f1c81ca9c37f406ec9b2a338c3c`
`font_03_sfnt_off000185be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x185BE	15180 bytes
SHA-256: `621cdff8a68f922334f25e134d1a1673784c11ce93fb11c9a2bfed2a388b608d`
`font_04_sfnt_off0001b42b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1B42B	16060 bytes
SHA-256: `bb4620ae2308066493f479cb0495314a41e91f5b0bfb2a754d9bad2ef34af03d`

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