PDF malware analysis — malicious · 3b095747e6d8ebba

MALICIOUS

PDF

87.8 KB Created: 2021-03-25 15:01:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 75536046ba5a8a5bd43c787d534aecd9 SHA-1: 8901d135a07266c63ca00725474ad5bf268c96ae SHA-256: 3b095747e6d8ebba134c3a8b6492f4f6c92b52361ec4d3dc2eb56cd513cdb01b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The primary malicious URL, https://jumiwimov.ru/award?keyword=synonyms+for+ielts+reading+pdf, is presented as a resource for IELTS reading synonyms, a common lure. ClamAV detection and ML classification confirm the malicious nature of the PDF, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

Heuristics 5

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.
ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://jumiwimov.ru/award?keyword=synonyms+for+ielts+reading+pdf
- http://benaletuzulug.sportsontheweb.net/75207614244.pdf
- http://neridofufuleteg.scienceontheweb.net/71805933827.pdf
- http://nariwunuzaw.scienceontheweb.net/27958425006.pdf
- http://nedavupagisezim.mygamesonline.org/sezujo.pdf
- http://napufokotipo.getenjoyment.net/anchoring_script_for_school_assembly.pdf
- http://fafijitesulexiz.mygamesonline.org/analysing_graphs_of_functions_and_relations.pdf
- http://kirakexig.mypressonline.com/jizewibotatutobuket.pdf
- http://jokerisirefole.22web.org/44959875047.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- http://sofibimibojas.myartsonline.com/what_jobs_bachelors_degree_in_psychology.pdf
- https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_8ad63c432fb846b6b62d7a0adafdcd68.pdf?index=true
- https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_adbd9f83e16545e1aad70a06ac001168.pdf?index=true
- https://2172aa7b-56d6-4bcb-a12f-aafeda7c7725.filesusr.com/ugd/0d9129_9d9e37f50a23440ab49192639c13ea89.pdf?index=true
- https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_642ffbfc28924bd6b75c72f2f1bd1d5a.pdf?index=true
- https://be56f97b-0727-4a8e-a141-4155b83e75ac.filesusr.com/ugd/5034d0_ff6e80945aae4de1a1803f71d1f91264.pdf?index=true
- https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_ed466155311d40398074798db5338779.pdf?index=true
- http://getetir.epizy.com/alphabet_song_free_video.pdf
- http://vanazabeso.epizy.com/cali_move.pdf
- https://f61a8d15-835b-4c36-a3db-e4ead73ab13f.filesusr.com/ugd/e9f5f3_109fa3070bc54288b8c65bffbc1b5e08.pdf?index=true
- http://bazuliditufo.epizy.com/historia_de_la_iglesia_cristiana_preguntas_y_respuestas_capitulo_18.pdf
- https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_c16a157778774ce9af2dd68dac24da34.pdf?index=true
- https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_1c54248b19084af3b56cfe714e166e32.pdf?index=true
- https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_f937758a143e4c1d88db061f923464e2.pdf?index=true
- https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_32d365d787e84291822a5b0515621d2b.pdf?index=true
- http://muvemaxadal.onlinewebshop.net/kizezisuso.pdf
- https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_06fbf033419141b4a77a4ec6ea7590a7.pdf?index=true
- https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_756ee87962f547ae99af48221d086e7f.pdf?index=true
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010b8e.bin` `8f7145ba61fab69fe879417dcac1dafe1d7ea9d13d47f5cee40523a2226f1b05`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B8E	5356 bytes
`font_01_sfnt_off00011da0.bin` `f465bd57ec40ead9768059ceccc506a4a9a68f912ca9c6b54609657db9fe51e3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DA0	10492 bytes
`font_02_sfnt_off00014153.bin` `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14153	4324 bytes

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