PDF malware analysis — malicious · 3edd1e590075e83d

MALICIOUS

PDF

74.5 KB Created: 2021-02-08 21:38:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: 37185eaee8fc0bb27df27e0e19908aa2 SHA-1: 08c47863e12a353040a22257e2555fc150586680 SHA-256: 3edd1e590075e83dd9a6fb6b91463fe5512e922c245409098e3e9ad404ec5a04

226 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document employs a social engineering lure, instructing the user to install a browser extension or update to view content, which is a common tactic for malware delivery or credential theft. The document also contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 7

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.
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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://jottigo.ru/wb?keyword=instagram%20application%20%20for%20pc PDF link annotation
- https://cdn.sqhk.co/rivogigaweb/hipI1ja/pitbull_dog_food_muscle.pdfIn PDF document text
- https://gazobibulome.weebly.com/uploads/1/3/4/7/134775133/e1e6ef5.pdfIn PDF document text
- https://wosobariwosamu.weebly.com/uploads/1/3/4/3/134372044/04b0e89.pdfIn PDF document text
- https://cdn.sqhk.co/wadelovelo/hf5QgjW/81503701467.pdfIn PDF document text
- https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/70f68b151.pdfIn PDF document text
- http://fb-pageunderreview.com/nogurafimepodabonajopile9k8zh.pdfIn PDF document text
- https://cdn.sqhk.co/gaxokakijefe/0GZpigy/cnc_machinist_salary_ohio.pdfIn PDF document text
- http://zdorovie-vashe-vse.xyz/ejercicios_de_espaol_primer_gradobjiqm.pdfIn PDF document text
- https://cdn.sqhk.co/seponidozit/Fjawnhg/zokizaxifizonejopole.pdfIn PDF document text
- https://sovinupuni.weebly.com/uploads/1/3/4/7/134762808/21376105.pdfIn PDF document text
- https://cdn.sqhk.co/nonuripot/fhdgc5C/20020555934.pdfIn PDF document text
- http://atomyimperial.ru/768332990564djk1.pdfIn PDF document text
- http://shoppermarket.online/xezunokumimijo41sbz.pdfIn PDF document text
- https://cdn.sqhk.co/zuxeromewime/Gfshhrd/parx_racing_live_stream.pdfIn PDF document text
- https://cdn.sqhk.co/fenozidu/9KbONLO/weboxejufewexowoxomupitej.pdfIn PDF document text
- https://cdn.sqhk.co/talexadu/6icjbHa/new_super_mario_bros_u_world_map_music.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/rilexazejuzovep/84331554701.pdfIn PDF document text
- https://s3.amazonaws.com/defujo/bucareli_treaty.pdfIn PDF document text
- https://s3.amazonaws.com/damerirazib/kujefu.pdfIn PDF document text
- https://s3.amazonaws.com/toniseligiwuzux/diagnosis_of_rheumatoid_arthritis_guidelines.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_off0000e62a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE62A	5272 bytes
SHA-256: `52c887d9f155befc885b268e6e7c0612c13f0b3926972e2ab2910d03c3d443c8`
`font_01_sfnt_off0000f80b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF80B	10788 bytes
SHA-256: `18fe4ddae60846a36958d2db38db74cb8f72c814c3d542e8f26af70bb5df828a`

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