PDF malware analysis — malicious · 87160191829d3c90

MALICIOUS

PDF

74.4 KB Created: 2021-03-19 17:01:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ba6c7499add9947148a4ee121d8873d2 SHA-1: 206db74151aedcc90c5754cce10dbe9d31363f11 SHA-256: 87160191829d3c90bf66fd6ef485b48f4182881990bcc9b6903d8f36a967cc51

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that, when visited, likely leads to a phishing or malware download site. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of an external URI points to a phishing lure, attempting to trick the user into believing they are accessing legitimate information.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://dafemum.ru/wix?keyword=letter+e+microscope+lab+answers
- https://static.s123-cdn-static.com/uploads/4476285/normal_5ff47e9d67c05.pdf
- https://cdn-cms.f-static.net/uploads/4446174/normal_602a55980ee08.pdf
- https://cdn.sqhk.co/tinulafi/cjbwKj0/como_hackear_ifighter_2_the_pacific_1942.pdf
- https://cdn-cms.f-static.net/uploads/4471971/normal_6020085d0d054.pdf
- http://xalenupom.getenjoyment.net/manual_auriculopuntura.pdf
- https://cdn-cms.f-static.net/uploads/4471250/normal_5fe7915992eda.pdf
- https://cdn.sqhk.co/dofexoxev/xibdKgh/amazon_seller_central_help_number.pdf
- https://cdn-cms.f-static.net/uploads/4451561/normal_602bde34eaf4a.pdf
- https://cdn.sqhk.co/silagigud/riiTOge/folded_business_cards_template.pdf
- http://mufosubofamar.mywebcommunity.org/alistair_macleod_short_stories.pdf
- https://cdn.sqhk.co/nunexijezep/bjcnghF/29427230968.pdf
- http://vasizazesunof.medianewsonline.com/12656998026.pdf
- http://kabonuwumew.66ghz.com/tupifoxude.pdf
- http://newipufisatag.scienceontheweb.net/sitenovigeperojenobiloka.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/tubukeganuji/fileminimizer_full_version.pdf
- https://s3.amazonaws.com/bidivo/monthly_budgeting_spreadsheet_template.pdf
- https://s3.amazonaws.com/dudigonifu/42546652053.pdf
- http://mamotupot.rf.gd/integration_formula_file_download.pdf
- 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e5ac.bin` `d7ce8c11f35554cb5df4736a852d49f43a8c9c52d382269e5cc2301b632d90a9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5AC	5252 bytes
`font_01_sfnt_off0000f781.bin` `943f7cfc3a881b78a4179efa9017cec6bbc955b801614745a03e4193c62ce11e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF781	10788 bytes

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