PDF malware analysis — malicious · 6f17138b711d9d58

MALICIOUS

PDF

88.5 KB Created: 2020-12-07 13:10:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27

MD5: d80fd2e8769793ac5fa72b3be912e298 SHA-1: 38eee45106eb130f67e63c628a5c4607a270462d SHA-256: 6f17138b711d9d58ca1d43d144e045903a8881f455ba30c3ecbf795d3710d434

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, trafftec.ru. The document body, though heavily obfuscated, contains text related to a 'Certified archivist exam', suggesting a social engineering lure. The presence of multiple embedded URLs and a high ML classifier score indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://trafftec.ru/123?utm_term=certified+archivist+exam PDF link annotation
- https://dovasuseburipir.weebly.com/uploads/1/3/4/3/134394860/373d5705df2bd2.pdfIn PDF document text
- https://jebapawobukil.weebly.com/uploads/1/3/4/5/134521284/zikoto_kuzijonaseru.pdfIn PDF document text
- https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/1cf22.pdfIn PDF document text
- https://virukuzababije.weebly.com/uploads/1/3/4/3/134350100/7506258.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/boxujetanonikuv/bengali_new_song_audio.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2581ed28-942e-4b6b-8601-701f7695372f/gufemenomove.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/72fbfca7-619c-4b06-a4e1-42d342f84c79/bread_cutting_guide_uk.pdfIn PDF document text
- https://s3.amazonaws.com/xamapebonijos/10920978476.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2fc37256-3d34-4426-a9b6-5243283622b7/13158918207.pdfIn PDF document text
- https://s3.amazonaws.com/goviwigax/blair_witch_2.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_off00011d38.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D38	5260 bytes
SHA-256: `3c75b70bb99097ae5330a3d8e7c70fb8c151af572c0048fd0dac48b0ebcd5379`
`font_01_sfnt_off00012efb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12EFB	11376 bytes
SHA-256: `accfa1e47fa3f1afbf3d0ef04a28fc5d2fcf2e1e265800f7098b566309de1a77`

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