PDF malware analysis — malicious · e11c5dfab1314421

MALICIOUS

PDF

40.8 KB Created: 2020-10-15 08:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15

MD5: e15b2a57b0ca53b4cb421168a3472cab SHA-1: ac869e37b89db9e6ea120190b07d89efac3a47be SHA-256: e11c5dfab131442141c022992a18f8653a63809e919a273c7f71b3df8e10b28f

224 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

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.
Remote-support tool lure high SE_REMOTE_SUPPORT_LURE

Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
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://cctraff.ru/strik?keyword=wechat+app+download+for+android+free In PDF document text
- https://cdn-cms.f-static.net/uploads/4367643/normal_5f8787d08d40c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366982/normal_5f8729ed7a60c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366010/normal_5f87c3622783e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366664/normal_5f87be7438146.pdfIn PDF document text
- https://site-1039199.mozfiles.com/files/1039199/rojavoze.pdfIn PDF document text
- https://site-1040210.mozfiles.com/files/1040210/wigasedi.pdfIn PDF document text
- https://site-1042731.mozfiles.com/files/1042731/81046838639.pdfIn PDF document text
- https://site-1041676.mozfiles.com/files/1041676/kazumuwazifonefebes.pdfIn PDF document text
- https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/987b21c6b.pdfIn PDF document text
- https://fanavepuru.weebly.com/uploads/1/3/1/8/131871984/7454624.pdfIn PDF document text
- https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/menojeluv_fitejezifug.pdfIn PDF document text
- https://rabexowubomisuw.weebly.com/uploads/1/3/1/4/131407155/59c9aabc.pdfIn PDF document text
- https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/mejurilulomipupudu.pdfIn PDF document text
- https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/1a01fd760930a90.pdfIn PDF document text
- https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/2002594.pdfIn PDF document text
- https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/porukofosu.pdfIn PDF document text
- https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/9777323.pdfIn PDF document text
- https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/bijagilutomifu.pdfIn PDF document text
- https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/fesixukorupu.pdfIn PDF document text
- https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/94a94b89c87.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/1/0483/3450/4089/files/ge_monogram_cooktop_manual.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/9060/8285/files/51507179031.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/6316/0231/files/6278835815.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_off00006294.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6294	5168 bytes
SHA-256: `acbaa1595aea2053af83486a7795e47f3e5b5fdb95ba6c01341f81233fc48f22`
`font_01_sfnt_off00007439.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7439	9704 bytes
SHA-256: `bd873e90922c78e9711fe2e4323320c83c055cc167ed1af921b22c2530e20837`

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