PDF malware analysis — malicious · 612889eebbe6513a

MALICIOUS

PDF

74.2 KB Created: 2021-03-17 13:48:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: f7979954f4f997fa9148ee46ad8209f7 SHA-1: 6e7c90aacedd1e86f8ee5af318ffaeb4d99bae79 SHA-256: 612889eebbe6513a3892cef02498ebc08efb8c4f807ede1390d749af8c7c9130

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to SEO-optimized URLs, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, and 'PDF_SEO_UTM_REDIRECTOR_LINK' highlights a redirector URL. The primary malicious URL identified is https://jumiwimov.ru/award?keyword=abstract+reasoning+sample+exam+pdf, which is likely used to deliver a malicious payload or conduct a phishing attack. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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.
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://jumiwimov.ru/award?keyword=abstract+reasoning+sample+exam+pdf PDF link annotation
- https://mabelemaje.weebly.com/uploads/1/3/4/7/134705401/tudaxodekedesa.pdfIn PDF document text
- https://xadatazibinul.weebly.com/uploads/1/3/1/4/131483053/zolavafuleg-wavomi.pdfIn PDF document text
- https://xososikanezav.weebly.com/uploads/1/3/4/8/134892973/xokuxek_tatonal.pdfIn PDF document text
- https://kuribigewisowe.weebly.com/uploads/1/3/4/6/134688213/1168105.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450345/normal_60508b416a3e2.pdfIn PDF document text
- https://farenutatovepo.weebly.com/uploads/1/3/4/5/134502273/xokiwexoga.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4406793/normal_604917b617535.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/lemerisinivum/e_commerce_website_templates_free_asp._net.pdfIn PDF document text
- https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_8e296e953ba04978952b26cba87eafde.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/sagotomagin/amazon_fire_phone_android_update.pdfIn PDF document text
- https://s3.amazonaws.com/jenisozazewubo/74682667794.pdfIn PDF document text
- https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_dbf12186592648f5a0ec9d87519c50df.pdf?index=trueIn PDF document text
- https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_a56b5678e3d94c8f8604fc779e844991.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/fuwawibu/how_to_sync_vizio_soundbar_to_lg_tv.pdfIn PDF document text
- https://s3.amazonaws.com/mijumomub/arabic_to_english_translation.pdfIn PDF document text
- https://s3.amazonaws.com/tabobujimo/tufotimipuzoruluteti.pdfIn PDF document text
- https://c5e26362-acc3-4c40-9db4-ce0cbd355080.filesusr.com/ugd/681527_66b8ae0e998a4eaeb0051e451ff830a1.pdf?index=trueIn PDF document text
- https://d7d9470a-9784-4c28-ac68-b1ab0f70ddf3.filesusr.com/ugd/148484_b9e0d68f5c2749bb8478721e135e3952.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/vawoginele/building_information_modeling_course_in_delhi.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_off0000e4c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4C7	5672 bytes
SHA-256: `193f50b6762cf59197b50ac45bea34530e5f23b7ba04f10daceae4fb091df21a`
`font_01_sfnt_off0000f7fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7FE	10492 bytes
SHA-256: `4b484db9d5d7ace1aad7a793f2ee27f897ebc49aad0a4e11eeed3c8b44f1853a`

Open this report in the interactive analyzer, or submit your own file for analysis.