PDF malware analysis — malicious · a4155f2a9cb6f036

MALICIOUS

PDF

40.8 KB Created: 2020-10-28 06:56:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11

MD5: 9218263cc800521986a2dfa680ed9366 SHA-1: 815e29b87245187425cb56cda5d57c3305a956cb SHA-256: a4155f2a9cb6f036771c8cf68a77afbd53cea7b8cabd88be8c981cbcffb92077

184 Risk Score

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://cctraff.ru/strik?keyword=microsoft+office+2010+ppt+free+download In PDF document text
- https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/kexiguritivibu.pdfIn PDF document text
- https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/kodutije_limoseked.pdfIn PDF document text
- https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/nugoludutixas-muneguged-xuroxulape.pdfIn PDF document text
- https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/kineratutajo-domonasapafi-rasogabime-talisanaki.pdfIn PDF document text
- https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/wibenarabixoderi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372085/normal_5f8ce87d37764.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386852/normal_5f8f8b8325dc5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383471/normal_5f8cbd30e4b33.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380523/normal_5f9211e73b0fd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4384817/normal_5f9200cb9efcc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380088/normal_5f8fcd677eedd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369654/normal_5f973c147f4bd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369317/normal_5f98710e7aaf9.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://s3.amazonaws.com/ruzaganog/convert_to_base64_encoded_string.pdfIn PDF document text
- https://s3.amazonaws.com/defipedibe/levexefer.pdfIn PDF document text
- https://s3.amazonaws.com/felasorarabipis/nezolumipigebetebo.pdfIn PDF document text
- https://s3.amazonaws.com/rimepusox/57528011951.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0496/2307/2921/files/homedics_cool_mist_humidifier_instructions.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0505/6102/4185/files/58024154533.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/0642/5249/files/blade_runner_quotes_tyrell.pdfIn PDF document text
- https://s3.amazonaws.com/gurowozenupifi/16096135540.pdfIn PDF document text
- https://s3.amazonaws.com/wotodedaruzuk/tanenemenan.pdfIn PDF document text
- https://s3.amazonaws.com/jutenojamega/dakakekekovovilu.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000521d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x521D	5360 bytes
SHA-256: `91720cb78a79e7177b8a6388977654179af942d81b640ea6efa0f1d6e7f56184`
`font_01_sfnt_off00006472.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6472	10300 bytes
SHA-256: `29fe996a4a9a06d15f3f76e30dfa597485a19c70929f343902e351a84c0ba695`
`font_02_sfnt_off000087b3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x87B3	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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