PDF malware analysis — malicious · 10ddf50809c89718

MALICIOUS

PDF

80.5 KB Created: 2021-03-11 23:12:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02

MD5: a4d42eed3c1c3cae2d3159cdcf1726e6 SHA-1: 9d8b2fd269058017ec2fffe13e5be9c7a8416c57 SHA-256: 10ddf50809c897186855761f948277fb0ba56b7137c7323ca54017ebaf7a8d1f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The heuristic PDF_SEO_LINK_FARM indicates the presence of a large number of external links, with one prominent URL being https://golowaki.ru/award?keyword=uganda+public+health+act+2020+pdf. This suggests the document's primary purpose is to redirect users to potentially malicious or deceptive websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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.
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://golowaki.ru/award?keyword=uganda+public+health+act+2020+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4393911/normal_600d1ee031bab.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4489032/normal_603efa407aa9d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4414336/normal_6000093b50f58.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495838/normal_601a505d07579.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4478148/normal_602c70a8166ce.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450003/normal_5fe624945e85a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420760/normal_6018e2e3d17a2.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://a146b927-ed54-472d-b3a8-6b137e313b92.filesusr.com/ugd/4d400c_88b918765c894dfb8f32f6abacd385c8.pdf?index=trueIn PDF document text
- https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_dd332ed378454828ae6e127690273488.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/girilifawuxi/administracion_de_medicamentos_por_via_subcutanea_ventajas_y_desventajas.pdfIn PDF document text
- https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_361391af5a1c4570bdc7ff42aa2cb13d.pdf?index=trueIn PDF document text
- https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_08216d3c54da4c5abb41477bc71d1a2c.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/mijumomub/10_day_green_smoothie_recipes.pdfIn PDF document text
- https://s3.amazonaws.com/xujitezu/85150877624.pdfIn PDF document text
- https://s3.amazonaws.com/dapekufoxiraku/pathophysiology_of_aplastic_anemia.pdfIn PDF document text
- https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_a87c0533e72b4628adab3c8ab7ddbf4c.pdf?index=trueIn PDF document text
- https://276658a2-c6b1-4a23-bc3b-56c82bce4278.filesusr.com/ugd/f9448a_966f2dba69f1457b874eecb0bca215bc.pdf?index=trueIn PDF document text
- https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_1da0a8341dda498ea76fa6ceba593ba2.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/mawesenasijoser/73717275218.pdfIn PDF document text
- https://s3.amazonaws.com/ronatiduzoxij/pinofotofaxibewa.pdfIn PDF document text
- https://s3.amazonaws.com/sezebepit/rakel.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_off0000f202.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF202	5320 bytes
SHA-256: `76579fc7937c021162c701f75da28a0ffa5ffd69726de418397d23839a89c679`
`font_01_sfnt_off00010412.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10412	10044 bytes
SHA-256: `bed1a368e8c2218965fa2932ffb03d6480982a60b33c202d7a7c1816659164ec`
`font_02_sfnt_off0001267b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1267B	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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