PDF malware analysis — malicious · 539fa69e4769d85e

MALICIOUS

PDF

88.8 KB Created: 2021-03-01 09:01:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: 89e23aeecc376448e0687a6988b3406a SHA-1: f5a2a3382d1930e003804b3355065ea004ff1ca0 SHA-256: 539fa69e4769d85ec25601552c26b8ce28a8d4ae6b849a0669cfff0ecf8edf91

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to 'Happy wheels 5 games', likely to entice users to click on embedded links. The presence of multiple disposable hosting links further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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://druttle.ru/wix?keyword=happy+wheels+5+games PDF link annotation
- http://alkostore.xyz/debupewenominwtq5.pdfIn PDF document text
- http://jaralet.getenjoyment.net/65848491557.pdfIn PDF document text
- http://lnstagramcopyrightmanagement.com/android_callback_vs_listenern7ieq.pdfIn PDF document text
- https://vulodimov.weebly.com/uploads/1/3/4/8/134880101/00ebe671faf89.pdfIn PDF document text
- http://centerbluebadge.com/free_workplace_safety_posters1h8lq.pdfIn PDF document text
- https://doxiviju.weebly.com/uploads/1/3/2/3/132302912/vubimop-nezopupi.pdfIn PDF document text
- https://vaseviga.weebly.com/uploads/1/3/3/9/133986607/pofegitazade.pdfIn PDF document text
- http://reduslim-italiaofficial.site/21093554860xxdfp.pdfIn PDF document text
- https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/5d6d76e10a9.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4368246/normal_6008cf9d2be9f.pdfIn PDF document text
- http://hookup153.online/bogodutijunutavaremavojedxm53b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368504/normal_602105897fb2b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4481052/normal_5ff854bcaf081.pdfIn PDF document text
- https://mamumudud.weebly.com/uploads/1/3/0/8/130814078/woxurarikanolo.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4381347/normal_5fe46021b3e3c.pdfIn PDF document text
- https://wisevagidigo.weebly.com/uploads/1/3/0/7/130740356/c9d0e.pdfIn PDF document text
- https://wisatevifo.weebly.com/uploads/1/3/0/7/130775851/wuwonutivuda-kigudusodeb-wuwiza-sejubenizol.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://womawujun.atwebpages.com/mamoduzofijevasuxerug.pdfIn PDF document text
- http://segimoto.myartsonline.com/is_mechanical_engineering_a_science_degree.pdfIn PDF document text
- https://s3.amazonaws.com/dutuzanob/70667922986.pdfIn PDF document text
- https://s3.amazonaws.com/salosibejodod/26700475570.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fe7f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE7F	4860 bytes
SHA-256: `c5689c7f1d4f3a81b84a61c8a2230ff42865af1d4de302a62ef9d6c4fc8b224c`
`font_01_sfnt_off00010f1a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F1A	10212 bytes
SHA-256: `fb60c15c5b0c650d69c2d423c271d80526ed4d5745f2c109a777dc6d17463c37`
`font_02_sfnt_off00013265.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13265	16092 bytes
SHA-256: `ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073`
`font_03_sfnt_off0001472d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1472D	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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