PDF malware analysis — malicious · fad1b205d15c46b4

MALICIOUS

PDF

79.3 KB Created: 2021-03-23 10:56:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: c3bd818546c2205f7f3675adef302e84 SHA-1: c930f9a6fc774abcfb2a01cda651214ed00faccc SHA-256: fad1b205d15c46b475a34a703ebacf9b0bf54840a59779b3099a7fbfd43c85e1

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to disposable domains, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were extracted, the structure suggests a link farm designed to redirect users, potentially to phishing sites or to download further malware. The presence of embedded URLs and the overall suspicious link farm activity strongly indicate a malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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.
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://jumiwimov.ru/123?utm_term=bottom+navigation+activity+android+example PDF link annotation
- http://koponegigat.medianewsonline.com/19694529311.pdfIn PDF document text
- http://pozufopajosel.mypressonline.com/85038932166.pdfIn PDF document text
- https://tupevunokojig.weebly.com/uploads/1/3/1/4/131454116/9205a1.pdfIn PDF document text
- http://wapividazofar.scienceontheweb.net/boy_scouts_of_america_v._dale_case_brief.pdfIn PDF document text
- https://tulugawaluga.weebly.com/uploads/1/3/0/9/130969515/9a652.pdfIn PDF document text
- http://duwinijuj.mypressonline.com/matlab_function_file_extension.pdfIn PDF document text
- https://lodarexuxune.weebly.com/uploads/1/3/4/3/134352809/sinom.pdfIn PDF document text
- https://buwenesuxunuga.weebly.com/uploads/1/3/4/8/134883777/motezubalovukod-timunigafaloduk.pdfIn PDF document text
- http://junumidutuzakox.getenjoyment.net/9287726145.pdfIn PDF document text
- https://xukizawumu.weebly.com/uploads/1/3/1/3/131380236/9601986.pdfIn PDF document text
- https://fafenerukore.weebly.com/uploads/1/3/1/3/131398145/6828455.pdfIn PDF document text
- https://xaxozugine.weebly.com/uploads/1/3/2/3/132303195/pogow.pdfIn PDF document text
- https://vabikepopuf.weebly.com/uploads/1/3/2/3/132303012/xukogifanax-bexusikebekelev-rodetewuvez.pdfIn PDF document text
- https://gavuzolarot.weebly.com/uploads/1/3/4/4/134458525/48eae.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://8994dc82-3839-475c-8de5-8afaa5c13229.filesusr.com/ugd/798b5e_9aba735788f446a3b3d624e22a9471af.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/zizene/disorders_of_respiratory_system.pdfIn PDF document text
- https://s3.amazonaws.com/bisiku/33152938929.pdfIn PDF document text
- https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_d8ec85c45e634085a3e9d3bfb82962bc.pdf?index=trueIn PDF document text
- http://godusisoti.onlinewebshop.net/functional_and_nonfunctional_testing.pdfIn PDF document text
- https://s3.amazonaws.com/jasadavebaga/bill_burr_paper_tiger.pdfIn PDF document text
- https://s3.amazonaws.com/wokesabisevo/emily_bronte_books.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e174.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE174	5492 bytes
SHA-256: `8f06ba117d308745523259f1769c147d555eacc78a7b873a0a57d2fd3c36d6c5`
`font_01_sfnt_off0000f421.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF421	10496 bytes
SHA-256: `1cc5f0d8fc2c8cc2e51726ef13142d15236fa8f2a37245548e3b83ba12befe1c`
`font_02_sfnt_off00011858.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11858	16204 bytes
SHA-256: `541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501`

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