PDF malware analysis — malicious · 702f7058c08bda43

MALICIOUS

PDF

82.6 KB Created: 2021-05-13 22:39:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 59c158a12e2b5491c452be22a6ca039b SHA-1: 54183816e0923488353ea5e8de32c3110592cabf SHA-256: 702f7058c08bda43f3ae00ad3af316fcb41d7e634bb9624ce36721f948d524f0

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or distribution mechanism. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs and the nature of the heuristics point towards an attempt to manipulate search engine results or redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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 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.
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 http://gagerovovus.22web.org/bedevowusezovejuvezoxoziz.pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4446761/normal_603c3b0771e50.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4445864/normal_602c939137c2a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4391903/normal_6026109912eae.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368975/normal_6023198864b52.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417212/normal_6026163d89620.pdfIn PDF document text
- http://xobalaxu.22web.org/magepizola.pdfIn PDF document text
- http://labetimo.iblogger.org/maths_worksheets_year_1.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://feedproxy.google.com/~r/wb/ENAH/~3/bQ3nTxENlgE/wb?keyword=bengali%20to%20english%20dictionary%20download%20for%20pcPDF link annotation
- https://s3.amazonaws.com/voxulija/dufagipa.pdfIn PDF document text
- http://bikikifuxax.epizy.com/99908819107.pdfIn PDF document text
- https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_9ac67d405e4341cf96c4c82adfb2161d.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/zunaduxa/xemafupuwofitejopen.pdfIn PDF document text
- https://s3.amazonaws.com/setaxilitozuko/linux_chmod_cheat_sheet.pdfIn PDF document text
- https://s3.amazonaws.com/wixanarer/60949930638.pdfIn PDF document text
- https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_a49fadfddeec4cfc9fd5b60bd73bf675.pdf?index=trueIn PDF document text
- http://goxakimolo.epizy.com/how_to_write_an_amends_letter_na.pdfIn PDF document text
- https://a819be37-316e-4347-83bc-b067fb6953c8.filesusr.com/ugd/d5662a_fee68169a0b8433e8e9a33f757b431bd.pdf?index=trueIn PDF document text
- http://lagorov.rf.gd/2020_ashrae_handbook_heating_ventilating_and_air_conditioning_applications.pdfIn PDF document text
- https://s3.amazonaws.com/lekizopiloref/public_relations_writing_principles_in_practice.pdfIn PDF document text
- https://s3.amazonaws.com/debiwelof/86126253500.pdfIn PDF document text
- https://s3.amazonaws.com/pevarijidasalop/zemimevutaguxixu.pdfIn PDF document text
- http://rilulavonepuv.epizy.com/differential_equations_multiple_choice_questions_with_answers.pdfIn PDF document text
- http://wamigorudazuz.epizy.com/82216887509.pdfIn PDF document text
- https://s3.amazonaws.com/xidazeze/arksey_primary_school_ofsted_report.pdfIn PDF document text
- http://lovagijikem.epizy.com/rugilekavumebededivosuba.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
- http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f0b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0B2	5660 bytes
SHA-256: `dd6634cd471c025a7b70340de8fef8f10a5366676b5fcbc0b219ccb639a106cb`
`font_01_sfnt_off0001040a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1040A	5712 bytes
SHA-256: `5dc16cc8784c58937a371fe323fc66ac278a1ae711f80f7fce6b1cbd4cf2bb22`
`font_02_sfnt_off000116b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x116B2	10952 bytes
SHA-256: `97d8f840f3478ce5ec62e0bf5f617a3422b1db7664a5c0c647d89de0e026cd90`

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