PDF malware analysis — malicious · bbfa53477172fa14

MALICIOUS

PDF

79.3 KB Created: 2021-01-22 16:41:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 0ee5386d76d90b8b45418573fe4065a7 SHA-1: 191a17a481e0f9eda4281cbdb8af76b72bc17059 SHA-256: bbfa53477172fa14ec7905d52f94d74edcb49551d37e39bfc7eeaf6376ad124c

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to a 'Star scoutmaster conference worksheet'. No scripts were extracted, but the presence of external links and the nature of the heuristics strongly indicate an attempt to lead the user to a phishing or malware-hosting site.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=star+scoutmaster+conference+worksheet PDF link annotation
- https://xemibunadagom.weebly.com/uploads/1/3/4/6/134639404/foruvirimawiniporad.pdfIn PDF document text
- https://site-1247225.mozfiles.com/files/1247225/52163749634.pdfIn PDF document text
- https://site-1167963.mozfiles.com/files/1167963/lenovo_ideapad_320.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4488346/normal_5fd846c7cf263.pdfIn PDF document text
- https://wunogalabapa.weebly.com/uploads/1/3/4/6/134603674/5628489.pdfIn PDF document text
- https://zamikife.weebly.com/uploads/1/3/1/6/131606416/2c99d.pdfIn PDF document text
- https://topizamo.weebly.com/uploads/1/3/4/4/134435864/8145886.pdfIn PDF document text
- https://site-1168092.mozfiles.com/files/1168092/free_company_letterhead_template_word_2007.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4457849/normal_5fdebf6f3607f.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4387567/normal_6008002783aa4.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4473062/normal_6006e2bce4601.pdfIn PDF document text
- https://site-1175781.mozfiles.com/files/1175781/steven_universe_amino_apkpure.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495390/normal_5fd6d164aadd2.pdfIn PDF document text
- https://barigager.weebly.com/uploads/1/3/1/3/131398159/sukezasajiku.pdfIn PDF document text
- https://dikasawo.weebly.com/uploads/1/3/5/3/135349802/b615f6bd803ed.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4474723/normal_5fc7c9859880d.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
- https://s3.amazonaws.com/visagogijulep/85648197137.pdfIn PDF document text
- https://s3.amazonaws.com/jawusawar/2019_and_2020_monthly_calendar_template.pdfIn PDF document text
- https://s3.amazonaws.com/tonisefoteka/html_templates_for_website_designing.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_off0000e8ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8AC	5180 bytes
SHA-256: `34b98eabb0937b2163231bd6fc4eac97268746b0b6727860c50735e622125794`
`font_01_sfnt_off0000fa1b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA1B	11628 bytes
SHA-256: `3ad83948620fd84d8fab94d91995c5c78dcfd4cdfa572f5e003654ef27ba4e7b`
`font_02_sfnt_off00012032.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12032	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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