PDF malware analysis — malicious · 7506118db7f52715

MALICIOUS

PDF

147.7 KB Created: 2021-06-05 03:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 8d48e656433b22f9ef0d0723295c202f SHA-1: 038d69324b1cab68e659d5de1ce8de2b9d748b6c SHA-256: 7506118db7f527151d71451f9c2b0dca7c6f1c6906b3be68ee3ac24754e175b4

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a primary external URI pointing to 'https://pelibifir.ru/123?utm_term=rpg+maker+platformer'. This URL, combined with the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic, indicates a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

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 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://pelibifir.ru/123?utm_term=rpg+maker+platformer PDF link annotation
- https://static.s123-cdn-static.com/uploads/4411918/normal_5fcc367a80187.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413967/normal_6032731ee0506.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4392862/normal_5fdebcb6ae1f3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4467612/normal_6069e80eee265.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4451231/normal_605a57964953e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4448540/normal_602d0192345dc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450509/normal_603cc76f8c50f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379968/normal_6014e040bdcd8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4456420/normal_605705a75dd4f.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://pazimonofe.pbworks.com/f/72755523129.pdfIn PDF document text
- http://risuxujuvu.pbworks.com/f/gasorijagag.pdfIn PDF document text
- http://numefen.pbworks.com/w/file/fetch/144539325/79413339748.pdfIn PDF document text
- http://dekokos.pbworks.com/w/file/fetch/144418635/bill_gates_documentary_trailer.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ef9e2e2c-12b5-417d-ae6e-767dc3f8769d/will_a_battery_tender_junior_charge_a_deep_cycle_battery.pdfIn PDF document text
- http://rerikisozid.pbworks.com/f/how_to_use_airline_incidental_credit.pdfIn PDF document text
- http://tovemubu.pbworks.com/w/file/fetch/144586491/powamexifabaxogoravadobul.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2e8cff44-d52b-41e4-84d6-7a217bd6b921/22399830934.pdfIn PDF document text
- http://fadoposapat.pbworks.com/w/file/fetch/144476691/what_are_some_british_cuss_words.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9997c910-42dd-4e2b-9f68-2aa38c45f13b/how_to_setup_netflix_on_dish_hopper.pdfIn PDF document text
- http://wiliser.pbworks.com/f/how_can_i_get_my_w2_from_burger_king.pdfIn PDF document text
- http://vafobotigef.pbworks.com/w/file/fetch/144631200/nonton_drama_cambrian_period_sub_indo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/be87c8ca-1003-4f8d-8b83-2412c174f1e2/auto_clicker_for_chromebook_roblox.pdfIn PDF document text
- http://jesababa.pbworks.com/f/haematology_textbook_free_download.pdfIn PDF document text
- http://sazupamufode.pbworks.com/f/fowuzesulerimamusepuz.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_off0001cec4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1CEC4	17336 bytes
SHA-256: `af24a63b49aae05df492bbb004470c1626c612cf32ddc0b1b5f620b5ff15a4a4`
`font_01_sfnt_off00020749.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x20749	5116 bytes
SHA-256: `76b840e02dc88ba54a0c71786652864ca2fb51b1534235db2536fb7602a04361`
`font_02_sfnt_off000218a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x218A7	11752 bytes
SHA-256: `b127ee5f09e164fa1df2ef409134283dc5a0be1da6a287d5ada0afc81128c533`

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