PDF malware analysis — malicious · 5cbc2509abfb6846

MALICIOUS

PDF

51.2 KB Created: 2020-10-13 10:50:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15

MD5: f2138aec2fd5a9e3a8164148f0dbfad5 SHA-1: 7553dbd7cbf094b82b9f2edd7953b8768c25a226 SHA-256: 5cbc2509abfb6846e748b5374c47c57657a4027d2c15a0181e84d40b1655262a

134 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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/strik?keyword=android+developer+emulator+windows In PDF document text
- https://site-1042884.mozfiles.com/files/1042884/sipuraj.pdfIn PDF document text
- https://site-1036909.mozfiles.com/files/1036909/16238386838.pdfIn PDF document text
- https://site-1042884.mozfiles.com/files/1042884/mudodefusupaluredup.pdfIn PDF document text
- https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/jatelu-zukolugaw.pdfIn PDF document text
- https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/3250b5961ed1.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0287/9387/files/fast_food_nation_chapter_2_questions_and_answers.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/3905/4231/files/probability_worksheet_9.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/7668/9825/files/pattern_recognition_book.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/5555/4470/files/31801743739.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_off00008adc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8ADC	5244 bytes
SHA-256: `f4228032a910ba9d4604753510b419e6de69f7b47e4518ee18f4018291cc8f96`
`font_01_sfnt_off00009ca7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9CA7	10364 bytes
SHA-256: `ffddee7d8f6244b19ffb9f7e7d13cb7bc9cac3aee1409be1618caa9ce999432a`

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