PDF malware analysis — malicious · 7b3d92c28aca9990

MALICIOUS

PDF

79.0 KB Created: 2021-03-22 03:54:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 20b53f6b52c37e7f5e6ec07115404416 SHA-1: 9789c743e1fafbd54202efc121cc85c309240bd6 SHA-256: 7b3d92c28aca9990d65c4d2fca0e014b22589cb95063bdfc07c4623c1656a1ac

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to education in Mexico, aligning with spearphishing tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

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://druttle.ru/wix?keyword=falta+de+educacion+en+mexico
- https://cdn-cms.f-static.net/uploads/4408319/normal_60220c0d3558f.pdf
- https://cdn-cms.f-static.net/uploads/4468296/normal_604f10970a9f6.pdf
- http://namafafiteg.mypressonline.com/12042840208.pdf
- http://wejuzofibab.medianewsonline.com/97257697505.pdf
- http://zakomuxoza.getenjoyment.net/kosuso.pdf
- http://kixurox.getenjoyment.net/wipumalaza.pdf
- https://cdn-cms.f-static.net/uploads/4374859/normal_6016b6a611041.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/vebenok/informelle_anrede_englisch_email.pdf
- https://s3.amazonaws.com/jivamubug/approval_sheet_in_research.pdf
- http://fatofejeripise.rf.gd/gadisuzadev.pdf
- https://uploads.strikinglycdn.com/files/cd8a3395-6caa-4e70-8c12-433d0abd4f9d/rinnai_556ftr_manual.pdf
- http://sugebajofurite.rf.gd/form_amalgamasi_bpjs_ketenagakerjaan.pdf
- https://s3.amazonaws.com/bopuxosavubare/31916677753.pdf
- https://uploads.strikinglycdn.com/files/af5a1ee8-b1c3-4162-911b-81862e33436e/the_hierophant_reversed_meaning_love.pdf
- http://jizemefuzix.epizy.com/utilitarian_theory_of_justice.pdf
- https://uploads.strikinglycdn.com/files/79aa04f5-5155-4372-8d21-84ec8192f700/nordictrack_c700_cost.pdf
- https://s3.amazonaws.com/padosumifubobo/degavevefo.pdf
- http://kagijido.myartsonline.com/fadaviwugofef.pdf
- https://s3.amazonaws.com/voropa/19491061536.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_off0000f71e.bin` `ed1b0e16536e00902a587b1896c9875d5a2db5f80a604e4b20e32ec2b04711a1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF71E	4836 bytes
`font_01_sfnt_off00010787.bin` `083f2ee54100e0958e5f2fc36f73709439ab046455ae208fb986a0bf4b0b41c8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10787	12060 bytes

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