PDF malware analysis — malicious · 7d1b8a3678e5ecc2

MALICIOUS

PDF

93.1 KB Created: 2021-03-30 12:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 3ab45f65ffe7bec690d457c6b22382c8 SHA-1: bad796fea968ccf1315fd4f722cf15eddc11216d SHA-256: 7d1b8a3678e5ecc2ab091b38a0ec684b6b9b79d3466d16d2d5d50b9c820a1fc5

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to disposable domains and employing UTM parameters, indicative of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are characteristic of a malicious document designed to redirect users to harmful sites.

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 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://gimoguvi.ru/strik?utm_term=chicco+bravo+stroller+age+limit PDF link annotation
- http://kapusta.pro/rivajuruwexixrjugs.pdfIn PDF document text
- https://cdn.sqhk.co/dikapagoloza/wibggIA/free_music_download_unblocked_at_school.pdfIn PDF document text
- http://lifegirls.site/flying_birds_sound_effects_freenr850.pdfIn PDF document text
- http://jidokove.scienceontheweb.net/zupafuziboge.pdfIn PDF document text
- http://maykistore.ru/pact_of_the_tome_warlock_buildj9rx8.pdfIn PDF document text
- https://cdn.sqhk.co/murafabu/eAMjfhc/39145830466.pdfIn PDF document text
- http://beststudent.fun/wijagulorunejow38b8i.pdfIn PDF document text
- https://cdn.sqhk.co/pibexezases/ggjakja/download_mods_for_minecraft_guns.pdfIn PDF document text
- http://characduwe.space/will_university_open_in_2021dnti5.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_adfc2838a9a24ff498f28b39b76c9acb.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/mulerux/26382345646.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7026c3c4-38bb-45fb-88c3-fde2eabdd413/how_to_fall_out_of_love_debora_phillips.pdfIn PDF document text
- https://26577e91-18e8-42c3-8e85-49dcca1d6605.filesusr.com/ugd/195787_8e48bc601fe545f09b1153e617f5702e.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/kumasala/harry_potter_movies_online_netflix.pdfIn PDF document text
- http://pulutugorivexek.atwebpages.com/nulakuvi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b010c7ae-6a08-4938-a1e7-7861179770eb/highest_conduction_velocity_heart.pdfIn PDF document text
- https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_76067d579463462697ffc774a90eb635.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/b0bef418-27ab-43dd-a32e-e6a7e2a6d343/total_surrender_andrew_murray.pdfIn PDF document text
- https://4b5f4e46-8b81-4257-bf39-61fc08ba57b0.filesusr.com/ugd/7ea8bb_bf5f361b2b7243ff827b11573a630ce4.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/9e66d122-ba8d-4487-b23a-1ccf1c0ef4e9/xoxulaxuxo.pdfIn PDF document text
- https://s3.amazonaws.com/warapagefasovi/28505412309.pdfIn PDF document text
- https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_78ff5633d0ca433b8df061d0b27464fe.pdf?index=trueIn 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_off00012572.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12572	5316 bytes
SHA-256: `2939f7af464254fd6b605fe7936781e9d54bb2ba4d151ddcc061f89207c60765`
`font_01_sfnt_off0001375b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1375B	1904 bytes
SHA-256: `989d30aecdd0166ed1a39023e4ce8ff38defd726bfe46bbbdc7dc1b6906bee9d`
`font_02_sfnt_off00014050.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14050	11040 bytes
SHA-256: `139954c2d2345a44b331476435708ce3b05cd8f7e332e010adc779b0989f0d8b`

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