PDF malware analysis — malicious · c093ab540bccd773

MALICIOUS

PDF

57.5 KB Created: 2020-10-29 12:13:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: eae1eb0aac85d6b0f72b437372a95406 SHA-1: 1f80d4b707316f60f346892f5f09e4837b7f4c6d SHA-256: c093ab540bccd773cd921a1648a4387e555f085f53f5cf236820bc237e297f58

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous embedded links, many of which point to a malicious redirector URL. The document body, though heavily obfuscated, includes the title 'Ordeal by check story' and the malicious URL, suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector confirms a high likelihood of user compromise if the links are followed.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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=ordeal+by+check+story In PDF document text
- https://suranetu.weebly.com/uploads/1/3/4/4/134458043/4a9de565078707.pdfIn PDF document text
- https://xazaguzomolak.weebly.com/uploads/1/3/4/3/134375957/d8be5026b.pdfIn PDF document text
- https://dovekawelefirim.weebly.com/uploads/1/3/4/2/134266448/lamejafadijix.pdfIn PDF document text
- https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/numil.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/aab850cd-21c2-4188-9aa9-e68d45095ebd/gekuribuvegipitifasojo.pdfIn PDF document text
- https://s3.amazonaws.com/megulu/aurangabad_times_urdu_news_paper_today.pdfIn PDF document text
- https://s3.amazonaws.com/gofiguj/uk_arbitration_act_1996.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e5ac4528-7a9f-4c49-a799-d807abc09a6a/livuxogelixuzorikixato.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1997ffe9-93f2-47b2-a188-c43d42d72972/9465922456.pdfIn PDF document text
- https://s3.amazonaws.com/foneniz/business_research_process.pdfIn PDF document text
- https://s3.amazonaws.com/muvemasoxaji/relugoluwasumam.pdfIn PDF document text
- https://s3.amazonaws.com/dadupawo/mofomuzanisupu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/72868937-735c-4ca2-b5d0-cecf2c8595b3/fuxuva.pdfIn PDF document text
- https://s3.amazonaws.com/juduk/varitelet.pdfIn PDF document text
- https://s3.amazonaws.com/tipikaxe/swash_plate_axial_piston_pump.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/67c85b5d-0454-4103-93e9-235e000026cf/leronab.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4b50502f-4fc6-41e9-96fa-e5dc347e4e94/75094828861.pdfIn PDF document text
- https://s3.amazonaws.com/tadovu/sibewevoma.pdfIn PDF document text
- https://s3.amazonaws.com/tetazino/being_a_better_woman.pdfIn PDF document text
- https://s3.amazonaws.com/punurum/fevatos.pdfIn PDF document text
- https://s3.amazonaws.com/jumedemimo/fuzapeto.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_off0000a141.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA141	5360 bytes
SHA-256: `3006eb62a19e3a9aba7e20b062dede93ce7b35ecdb6858cb3706035569091ec5`
`font_01_sfnt_off0000b372.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB372	11056 bytes
SHA-256: `0e71813e7813dfe8ac7bdf04cdcbff885ef0c132aaa863c8f09ed7583e2df52c`

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