PDF malware analysis — malicious · 9c31de28cdc5cdd8

MALICIOUS

PDF

78.3 KB Created: 2021-03-11 11:17:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: be3cb3251098f35f5b824f189ac8a604 SHA-1: e3216950aebdd426721fe93d018480a247a5f4d3 SHA-256: 9c31de28cdc5cdd8d4b7083ace59bb83da67ed6792d619675c89e5d0d458f323

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'Sony Vegas 12 serial number and activation code', suggesting a lure for software piracy or a phishing attempt. The presence of multiple external URIs, including one on a disposable domain, indicates an attempt to redirect the user to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://baarspo.ru/strik?utm_term=sony+vegas+12+serial+number+and+activation+code PDF link annotation
- http://arthromedshop.xyz/24634984955pmd3x.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4443803/normal_5fdfd06f22f25.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375716/normal_602aa955cb79b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4472188/normal_6028fe754e178.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4403814/normal_5fcfb09fdccd6.pdfIn PDF document text
- http://minuzin.22web.org/sovebowajubodiwopob.pdfIn PDF document text
- https://cdn.sqhk.co/kupuruvew/qiezjjB/47385442078.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4464732/normal_6041031b9581e.pdfIn PDF document text
- http://cocobeautybar.ca/what_exactly_is_private_equityaoe24.pdfIn PDF document text
- http://waxevamebe.22web.org/59506906567.pdfIn PDF document text
- https://cdn.sqhk.co/jabisopomuxo/hYhgegj/zombie_defence_games_hacked.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://tikimolanevi.rf.gd/classify_quadrilaterals_worksheet_4th_grade.pdfIn PDF document text
- https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_1b2ff8cfb9ad4155a7989264cbe05a0b.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/4df7314c-0d9e-4f59-87de-a6bcf20e9295/how_to_report_levenes_test_of_homogeneity_anova_apa.pdfIn PDF document text
- https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_9e09da89d67849e6ba7d78e3422ec8e8.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/dc64b4c7-2208-4d23-98a3-1c90cb03ba1c/tobaranu.pdfIn PDF document text
- http://futifuzofu.rf.gd/32847569091.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/55eaddd2-3440-414b-aaa4-2f523bc3b1d6/bezopisixodipakimedeg.pdfIn PDF document text
- https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_224d651f9bf24124ba7b548ed7d1079c.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/79fe914e-bbd6-479a-910b-904ce698dc49/14362772972.pdfIn PDF document text
- http://fonimegalidoxu.epizy.com/2392245024.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e607aad7-eaa5-4172-a94f-8a1cb3a85e9d/suwuwijulatuvozavevuweka.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e5ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5AC	5732 bytes
SHA-256: `844528b5c94d8edb735ef78c46dd793d96241f42705fa7ba6a148d7aca84c389`
`font_01_sfnt_off0000f91d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF91D	11108 bytes
SHA-256: `4c4295b549f296404b72c2480e4b4e24a491156d08c934c6e1c7892fe16a507f`
`font_02_sfnt_off00011d9d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D9D	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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