PDF malware analysis — malicious · ea991a6b67bddb37

MALICIOUS

PDF

75.6 KB Created: 2021-03-01 17:53:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 5652b02a1ac626a1a055a2272f032ca6 SHA-1: b4dbbe88e30d9e0f1eafea9b5e27c17d4cdf7a1d SHA-256: ea991a6b67bddb37def88dfb05036aff4df67c1d94fa6f1e60a0e57cc3642a5f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://jacksth.ru/strik?utm_term=how+do+you+know+if+your+marbles+are+valuable
- https://sufifova.weebly.com/uploads/1/3/4/7/134736026/bijabavurezir.pdf
- https://pareruli.weebly.com/uploads/1/3/4/8/134891857/98bf3.pdf
- https://xebuzoxovekig.weebly.com/uploads/1/3/4/0/134018553/6742974.pdf
- https://cdn.sqhk.co/jawutuwek/Dhihdgc/soccer_star_2019_top_league_mod_apk_download.pdf
- https://gozibaduvixumu.weebly.com/uploads/1/3/4/6/134628844/5847428.pdf
- https://cdn.sqhk.co/tutabalero/ejdjdhc/40831536381.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://lemazuwijenuxan.rf.gd/birukoxufipojuzovivuxubev.pdf
- http://tekoboworitutew.epizy.com/lehninger_principles_of_biochemistry_chapter_6_solutions.pdf
- http://losalevova.epizy.com/android_apps_on_acer_c720.pdf
- https://s3.amazonaws.com/kakekojezutok/vubagobemiren.pdf
- https://s3.amazonaws.com/penale/roku_3900x_remote_app.pdf
- https://s3.amazonaws.com/kaxukok/high_school_reading_comprehension_passages.pdf
- https://s3.amazonaws.com/wanasuvedigo/kubegaguwetoxokelakelulip.pdf
- https://s3.amazonaws.com/peveziwoguxuzam/60038797318.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e8d9.bin` `6d9544a79ede5323843971b93e9fcef62ef929192a6c442c3eac487e93439d22`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8D9	5472 bytes
`font_01_sfnt_off0000fb78.bin` `7d2742b636153bb95795a63e88bfb0f030914076f49810d43505615db68cdf80`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB78	11228 bytes

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