PDF malware analysis — malicious · 6a25a557361af526

MALICIOUS

PDF

185.4 KB Created: 2021-03-11 18:25:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20

MD5: 0653c75e7414552280ec4e9943cc748f SHA-1: 36d00b1cf059271e8e7b71e5a95dbc2f00bfe895 SHA-256: 6a25a557361af5264f2449df438d388a62914ee5bb959443e845dca4f152001b

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains heuristics indicating it is a link farm designed to redirect users to external websites, with one specific URL identified as a potential lure for 'new hypertension guidelines 2020 pdf'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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/award?keyword=new+hypertension+guidelines+2020+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4480728/normal_60415fc05d68c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4422909/normal_600bf17e311d3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4462982/normal_602aeee15ad4e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4471988/normal_5fc57632b957c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4475392/normal_5fd76e0fe5e54.pdfIn PDF document text
- http://nipizakevenuvis.scienceontheweb.net/kefizopib.pdfIn PDF document text
- http://wanididezaj.getenjoyment.net/bergsonismo_deleuze.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4481411/normal_5fe33b315f222.pdfIn PDF document text
- http://mewudaguzexo.sportsontheweb.net/how_many_carbs_are_in_a_nacho_bell_grande_from_taco_bell.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4409619/normal_5fc60224d92f8.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://bac325b5-3710-4a60-ba01-c1ac5e8a7650.filesusr.com/ugd/c111de_1156892bcc494611bd1970689d8304fe.pdf?index=trueIn PDF document text
- http://webomaka.rf.gd/boxenesudamapepilusogelu.pdfIn PDF document text
- http://tulinavosubod.rf.gd/83386758464.pdfIn PDF document text
- https://780c8f77-0f51-49ab-8dd1-60a90eb210a4.filesusr.com/ugd/1b8612_539dfc81a6564e7aac063661fb4e14a9.pdf?index=trueIn PDF document text
- http://fipomazuwasa.epizy.com/how_to_restring_craftsman_25cc_string_trimmer.pdfIn PDF document text
- http://vepitejususas.atwebpages.com/tejeterovogitefepibag.pdfIn PDF document text
- https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_eefa06fdbc7e42c29276bd4617fa1015.pdf?index=trueIn PDF document text
- https://167c8e7b-8160-49a2-a88e-f26749d647c8.filesusr.com/ugd/1ad47d_a93ce368f50a4f85989cad135734f366.pdf?index=trueIn PDF document text
- https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_e5a7d87a8e8d4a1bbdfe951393aa236b.pdf?index=trueIn PDF document text
- http://rogofideb.onlinewebshop.net/ge_spacemaker_over_the_range_microwave_removal.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00027a93.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x27A93	5532 bytes
SHA-256: `ebfa357ebb26228d514471a26af5f26cd52c84fd47f1ef1eee41fd465475ad5a`
`font_01_sfnt_off00028d87.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x28D87	17016 bytes
SHA-256: `b39fbc92934c20f3cd4253088f347e5e5d9a304dbb4162ee19aa2cd8993a3409`
`font_02_sfnt_off0002c274.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2C274	16204 bytes
SHA-256: `e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15`

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