PDF malware analysis — malicious · 99e4e602df403807

MALICIOUS

PDF

66.3 KB Created: 2020-12-20 19:31:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 4cdea38cc96567d7c757a71656a692dc SHA-1: d88824eb54dbe74bb071ebbc027ba264f406f232 SHA-256: 99e4e602df403807890542a0681c5045644bba0c078d903db2a69eadd837a4b7

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a URL that redirects to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. ClamAV also detected it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'Valores morales segun autores pdf' to entice users to click the embedded link.

Machine Learning

Nyx PDF Classifier malicious score 0.9981

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://traffset.ru/aws?utm_term=valores+morales+segun+autores+pdf PDF link annotation
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/045b0237-7d08-41f0-999d-5d832ec45abf/xepidaxurefetudipujixola.pdfIn PDF document text
- https://s3.amazonaws.com/fukepez/android_studio_project_update_gradle_version.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1579b77d-ebc2-48a8-945a-4055abcf331e/33738557673.pdfIn PDF document text
- https://s3.amazonaws.com/zusevamasor/89873169171.pdfIn PDF document text
- https://static1.squarespace.com/static/5fc0dbcbbf71053ccb0ffb78/t/5fc454243f75b166435e7fc5/1606702117535/asa_instrument_oral_exam_guide.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0207ee9b-7c02-4e24-ac36-df5505976edb/gobapaso.pdfIn PDF document text
- https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4951f81c9a2a0c98227f/1606371665728/tales_of_wind_guide_berserker.pdfIn PDF document text
- https://s3.amazonaws.com/wusigipufuvowix/mailer_psd_template_free.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/30a71cec-220e-4631-ba84-5dc13b2cfa02/jojodenixugazugalogesefez.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c7a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC7A0	5324 bytes
SHA-256: `5c7f465e28f2884d91c3722a2b2a6460ee6df2264626f08a6a5993aba84db593`
`font_01_sfnt_off0000d9ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD9AB	10488 bytes
SHA-256: `f73de8dd053f1577916ba58a716627619eb999deb8784fb1df59cc011b7285a6`

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