PDF malware analysis — malicious · 9994d0ffb5d89b5d

MALICIOUS

PDF

98.6 KB Created: 2021-03-20 08:36:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10

MD5: f85c8103a93ac65c7230c75149931fd8 SHA-1: 814bad6b94e148f35e9ad423ad3761209697d284 SHA-256: 9994d0ffb5d89b5d16723a4cb1d6b2918e504a91fd5d7324fe5751fa7c610de7

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple embedded URLs pointing to disposable domains, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier also flagged the PDF as malicious. These indicators suggest the document's primary purpose is to redirect users to potentially harmful sites, likely as part of a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 4

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 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://dafemum.ru/strik?utm_term=fluke+435+series+110 In PDF document text
- http://bitopijo.iblogger.org/denilufomidoxizamibusu.pdfIn PDF document text
- https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/b6dd5dca74494.pdfIn PDF document text
- http://naxajogilelog.medianewsonline.com/toyota_camry_se_2019_price.pdfIn PDF document text
- https://tusujowifavenag.weebly.com/uploads/1/3/1/4/131453847/bamov.pdfIn PDF document text
- https://temavemata.weebly.com/uploads/1/3/4/6/134611183/734e35ef7d6190.pdfIn PDF document text
- http://mujubow.getenjoyment.net/kefeg.pdfIn PDF document text
- http://xuribof.medianewsonline.com/alexander_the_great_original_name.pdfIn PDF document text
- http://birulozezogi.iblogger.org/metso_jaw_crusher_c106.pdfIn PDF document text
- http://famozosivupiwij.sportsontheweb.net/words_that_start_with_a_to_describe_a_feeling_of_happiness.pdfIn PDF document text
- http://vazawujuzu.sportsontheweb.net/snapper_riding_lawn_mower_oil_change.pdfIn PDF document text
- http://www.opentle.orgIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://dadorisisewane.epizy.com/maruti_suzuki_vendor_quality_assurance_manual.pdfIn PDF document text
- https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_424db06dde924973a3078e1c0addea70.pdf?index=trueIn PDF document text
- http://joxamemi.epizy.com/visudo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/95cda08a-bc3a-4e73-9768-2159e642cdbd/sintomas_agudos_de_trombose_venosa_profunda.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b0d4bf0b-a89f-429d-8d49-c8e6825693bf/credit_one_bank_pay_your_bill_online_doxo.com.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/24d62d41-f8bd-409e-9bbe-37b235461e13/9394374406.pdfIn PDF document text
- http://jasosuwer.epizy.com/tikofexem.pdfIn PDF document text
- https://a2fe464c-28d1-4db8-bb2d-552ad9bc2f4d.filesusr.com/ugd/941bb1_d1dfeacac12349cbbd0ebf810e863b6b.pdf?index=trueIn 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://www.gnu.org/licenses/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off000110b5.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x110B5	17684 bytes
SHA-256: `61e3c7f5743ec35889cd92f46b02a59893e27c82729cf6c8c8aac7ad593e1fbf`
`font_00_sfnt_off0000ff64.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF64	5056 bytes
SHA-256: `9b736bb7d1c74fba76460ceedcd5b8a288a834db073f422674e622f35ac229ce`
`font_02_sfnt_off00013ff8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13FF8	10836 bytes
SHA-256: `2b48b8e924aa67e1a9f500debb7a9074d62ef5777c9a59dad22d6c105c9ece2e`
`font_03_sfnt_off00016564.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16564	16216 bytes
SHA-256: `fc9675ab77dc38f778c28e9ac9efabd702f9a26a4e0ce91c28384496f54534e1`

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