PDF malware analysis — malicious · d6de71a9950964e2

MALICIOUS

PDF

43.5 KB Created: 2020-10-29 10:46:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: 5b371871e13dbc0c2dcf82b549f51d71 SHA-1: 36bf9e2a11a1c85ab86f86bdeed72c259b3581f9 SHA-256: d6de71a9950964e2d3a9d8ba27ae97fce4a3ca85254e21dfac065c430526b66a

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and redirectors. The primary heuristic firings indicate that this is a malicious redirector and a link farm designed to manipulate search engine results or lead users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
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.
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.
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://ggtraff.ru/strik?keyword=affton+high+school+graduation+2020 In PDF document text
- https://cdn-cms.f-static.net/uploads/4366668/normal_5f95dfc42db2a.pdfIn PDF document text
- https://morekifozolil.weebly.com/uploads/1/3/4/3/134332894/3c52d0a8f8a2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413345/normal_5f98928a165de.pdfIn PDF document text
- https://kivuligob.weebly.com/uploads/1/3/0/8/130874143/f7445143d2e444f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389365/normal_5f8f754c51498.pdfIn PDF document text
- https://jupisururixed.weebly.com/uploads/1/3/4/3/134339091/zovamitabadukinuzagi.pdfIn PDF document text
- https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/6523888.pdfIn PDF document text
- https://xufizigox.weebly.com/uploads/1/3/4/4/134479456/25272327a5f0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4409411/normal_5f95f714d4ffb.pdfIn PDF document text
- https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/zanazanekoxel.pdfIn PDF document text
- https://lififamofupuge.weebly.com/uploads/1/3/4/3/134317858/9421903.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369797/normal_5f90d83b8264c.pdfIn PDF document text
- https://suragovitig.weebly.com/uploads/1/3/4/2/134265770/2365166.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366664/normal_5f8748373765c.pdfIn PDF document text
- https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/78f7b7ac897d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365628/normal_5f8d438e22556.pdfIn PDF document text
- https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/2922981.pdfIn PDF document text
- https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/826b873ef97b.pdfIn PDF document text
- https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/jepif_galawavosag_madofogapemet_situnofigukisok.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/sezebepit/bethesda_clasificacion.pdfIn PDF document text
- https://s3.amazonaws.com/fujadabez/xegodibapevik.pdfIn PDF document text
- https://s3.amazonaws.com/jofunozuzof/swka_angielskie_poziom_b2.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_off000069e9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x69E9	5544 bytes
SHA-256: `99b2a926387fd508edbbbf87c7d63fc32a773b87b1b87bff5b5d7e8e229de878`
`font_01_sfnt_off00007cc7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7CC7	10564 bytes
SHA-256: `9c6627355f1c4cd71061a58480dc3bb710afc4c43a0a7a9631441c990d41f05b`

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