PDF malware analysis — malicious · 45a14eca4717d3ef

MALICIOUS

PDF

77.5 KB Created: 2021-05-22 22:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: c94e3506aa3ecf5dc97ef46a4fd83026 SHA-1: 19e0f5e24942be8442a4db51745f76b1cfbe8b3a SHA-256: 45a14eca4717d3efcf089be30dc0c7ab0524962c8141e2005a92355f03ff5de1

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content or for SEO manipulation. The presence of embedded URLs further supports this malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 6

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.
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://jumiwimov.ru/strik?utm_term=webelos+uniform+patch+placement+2019 PDF link annotation
- https://static.s123-cdn-static.com/uploads/4465537/normal_5fc5b9543d7f5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4412607/normal_604729ddad997.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381534/normal_602f29fe54e73.pdfIn PDF document text
- https://zawurufaxi.weebly.com/uploads/1/3/4/8/134861846/beniv-ralusisolix.pdfIn PDF document text
- https://ziwolowuwuxux.weebly.com/uploads/1/3/5/3/135321756/26f89812bff1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4461497/normal_605ef65cde7f0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371023/normal_6046316b737fd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4501659/normal_6022cc2ca8248.pdfIn PDF document text
- https://zudejuzire.weebly.com/uploads/1/3/2/6/132681250/3165852.pdfIn PDF document text
- https://gukikaxut.weebly.com/uploads/1/3/0/7/130775725/siwojamiwe-laxagusakasalo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368732/normal_6061daad88781.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4456989/normal_6059cf4e9ca74.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4459029/normal_5fee413ade705.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366022/normal_6023ed6b9ec7c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4451954/normal_605cbabc10407.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/76c95910-5b30-4fe9-b02d-610cb3997fdf/sofefidulaf.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/121b9482-cbbc-469d-93b6-efd6573f69e3/banubalaxulimomevubilawid.pdfIn PDF document text
- https://s3.amazonaws.com/vibuvomomuv/21823215121.pdfIn PDF document text
- https://s3.amazonaws.com/fusidejebi/sha1_hash_file_format.pdfIn PDF document text
- https://s3.amazonaws.com/ragejufa/vupebenakore.pdfIn PDF document text
- https://s3.amazonaws.com/vawoginele/daredevil_netflix_imdb_parents_guide.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/68fba028-50b5-4bbd-85ad-dd353a98f0f5/canon_powershot_sx720_hs_user_manual.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_off0000efb3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFB3	5892 bytes
SHA-256: `5ceb0f761911855ce04938ead52bffea898513657f205f8dcde5622153b408b9`
`font_01_sfnt_off0001039b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1039B	10920 bytes
SHA-256: `264cce08f245cb83793224a0c1384d66ed53c4d2258af3610ef251b2d6d367a6`

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