PDF malware analysis — malicious · 6d8b35c725111715

MALICIOUS

PDF

85.8 KB Created: 2021-03-16 04:57:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: 2d334fc4445698d22068620d2ae84565 SHA-1: 3be897873aef0ae7a76d6920fcbd09553efc4f54 SHA-256: 6d8b35c7251117154f3ed269b7b9920203e5387e4f610a41346f1832f081fa55

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, with at least two pointing to potentially malicious domains. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the presence of multiple external URIs strongly suggests an attempt to redirect the user to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://jacksth.ru/123?utm_term=allure+reports+selenium+python PDF link annotation
- http://xupevagadozojad.22web.org/zexefi.pdfIn PDF document text
- http://instacopyrightcenter.com/bifezasazalazvnu2w.pdfIn PDF document text
- http://study-english-02.space/pekuwiserifojukukodox0e0.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4504839/normal_5ff3d39da3b94.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418370/normal_6049bd58038e4.pdfIn PDF document text
- http://goldstein.capital/355910422204bg7g.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369920/normal_600a512c9929c.pdfIn PDF document text
- http://digitalliteracyinstitute.com/focusrite_scarlett_2i2_3rd_gen_studio_packfwy2e.pdfIn PDF document text
- http://doworevo.22web.org/tivakobak.pdfIn PDF document text
- http://pugezesiw.mygamesonline.org/21952744023.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://gidubabe.myartsonline.com/canonicity_of_the_old_testament.pdfIn PDF document text
- https://746420f6-3007-491b-ba72-fd43be5094e5.filesusr.com/ugd/277b62_3d276bf46d9f4fccbfe519aebe7cdf0b.pdf?index=trueIn PDF document text
- http://rojepubaxogo.epizy.com/vumidalexefisurexonowisu.pdfIn PDF document text
- http://sukepavudopuje.epizy.com/how_does_brandon_burlsworth_die.pdfIn PDF document text
- https://69f1164a-dcd3-4310-9fb4-3b67f03bdbb0.filesusr.com/ugd/9d7282_b8e39cc321d64e67b0fdf58177560fd7.pdf?index=trueIn PDF document text
- https://b6e49935-6d58-4bde-831f-6e0b746776d3.filesusr.com/ugd/7d321f_1f05088dd31348ac9b6941408b878ea8.pdf?index=trueIn PDF document text
- https://aece7fbc-7072-4055-9cfa-29e0da41b620.filesusr.com/ugd/e878fd_ee94760345bf49ea848eec1653286b1d.pdf?index=trueIn PDF document text
- https://d4996ccb-aecf-47c4-aab6-3c4fe022e1b7.filesusr.com/ugd/b7ed05_9b14e7c14c774215b2d20d541650956d.pdf?index=trueIn PDF document text
- https://59b17237-83b3-47c6-9d40-f547da5b0434.filesusr.com/ugd/827194_4579b090b83144fb9a9a59e97029da7b.pdf?index=trueIn PDF document text
- http://sofidubanelen.epizy.com/83447415581.pdfIn PDF document text
- https://35479656-6a94-44d6-ac55-da507c14a2ae.filesusr.com/ugd/d68318_a3eab8e47d104f22933000eee3f4b960.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
- 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_off0000ee3d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE3D	4940 bytes
SHA-256: `25392dfc76c5facdfd18979d79d9b1e2d4ef0b4752f951d7d4885185cae6f440`
`font_01_sfnt_off0000fee4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEE4	17156 bytes
SHA-256: `a9837fd4c0fa261c05f9f3e183605a6cc26373e584048d29b91db267783e2836`
`font_02_sfnt_off0001344e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1344E	16204 bytes
SHA-256: `532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e`

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