PDF malware analysis — malicious · 77ce5177e0d19aff

MALICIOUS

PDF

62.1 KB Created: 2020-11-28 09:42:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02

MD5: 948e3927d18a74c826f94869f47428df SHA-1: e94b29f6a382c53091a9cb30614fd61df462ca81 SHA-256: 77ce5177e0d19affe5c6b6957518e196593db23ec9924a487378e4b1fbcc8a6c

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link to a known malicious redirector, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the presence of a malicious URL points to a likely phishing lure, potentially leading to further payload download.

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
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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://cctraff.ru/aws?utm_term=architecture+thesis+presentation+sheets In PDF document text
- https://cdn-cms.f-static.net/uploads/4415964/normal_5fb5b9eb1dc2b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366662/normal_5f873398e544c.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/simujix/columbus_clippers_schedule.pdfIn PDF document text
- https://s3.amazonaws.com/jiwisi/52520629535.pdfIn PDF document text
- https://s3.amazonaws.com/zebarufuridorur/complete_pet_vk.pdfIn PDF document text
- https://s3.amazonaws.com/zamemigojat/bekhayali_female_version_song_free.pdfIn PDF document text
- https://s3.amazonaws.com/sulasatevirexo/betovoji.pdfIn PDF document text
- https://s3.amazonaws.com/tawosutosuxi/marvel_puzzle_quest_mod_apk_unlock_all.pdfIn PDF document text
- https://s3.amazonaws.com/liguwubore/dukivepebagujemubaxolaxop.pdfIn PDF document text
- https://s3.amazonaws.com/xazarujokemus/html5_responsive_image_gallery_template.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_off0000b8d9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB8D9	4980 bytes
SHA-256: `9a1123758ec9c8eeb7e862a26bfad4ac333703c40bfd1a8020332d389e5e99a3`
`font_01_sfnt_off0000c9c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC9C0	9984 bytes
SHA-256: `f917d9fba4bc9d61e08a274b3c6f1523e11d57e81e7b0ac4ee51361a3d4c6381`

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