PDF malware analysis — malicious · f2d1be824ca47b3a

MALICIOUS

PDF

49.7 KB Created: 2020-10-25 18:01:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: b564ab81a348c9af170122a6b0898f72 SHA-1: 30fca1a65f6c278c23ca0f44a5b4f02c137ebc56 SHA-256: f2d1be824ca47b3a709821248f045decbdfb7961c41dd014f478fc27ba07b2c1

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, which is a strong indicator of malicious intent. The heuristic firings confirm this, identifying the PDF as a redirector and a link farm. The document body, though partially corrupted, contains the same URL as the malicious link, suggesting it's the primary lure.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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 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.
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/aws?keyword=libros+de+lectura+para+aprender+ingles+pdf+gratis In PDF document text
- https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/6578443.pdfIn PDF document text
- https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/88cfb18.pdfIn PDF document text
- https://juporolo.weebly.com/uploads/1/3/1/3/131380745/6389b1889f52e.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/1/0468/8750/1981/files/22769573791.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/4703/4266/files/bububad.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/8724/0093/files/66034839521.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/7482/5621/files/yenidoan_kistik_fibrozis.pdfIn PDF document text
- https://s3.amazonaws.com/tumasun/gayle_laakmann_mcdowell_cracking_the_pm_interview.pdfIn PDF document text
- https://s3.amazonaws.com/tetazino/casio_calculator_manual.pdfIn PDF document text
- https://s3.amazonaws.com/gomakobez/terapi_neuralgia_trigeminal.pdfIn PDF document text
- https://s3.amazonaws.com/vazisi/anti_caking_agents_in_food.pdfIn PDF document text
- https://s3.amazonaws.com/bulolimepol/35479943560.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ab76795a-deab-4ec2-bd6b-305212be01ae/gegotejogajakofimo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9125d887-40b9-4cdc-8b0c-44bd27f9ccea/dapoburubexepan.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/027e6a2b-8a65-4c22-bf45-50a9c9079442/xokoxen.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/876b5f58-668e-4261-b6c1-1d816a4d484e/petizedigojusijivozovupor.pdfIn PDF document text
- https://s3.amazonaws.com/fasanag/business_studies_grade_12_textbook.pdfIn PDF document text
- https://s3.amazonaws.com/vazisi/simple_budgeting_worksheets.pdfIn PDF document text
- https://s3.amazonaws.com/batoragubukepo/xanubem.pdfIn PDF document text
- https://s3.amazonaws.com/bulolimepol/87761061207.pdfIn PDF document text
- https://s3.amazonaws.com/pisik/bomavanuzigagolakes.pdfIn PDF document text
- https://s3.amazonaws.com/dukajevo/vitamin_a_deficiency_in_ethiopia.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_off00007ee6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7EE6	5404 bytes
SHA-256: `363049b8b1d60bc01fb8d98604431fe0241eb73042650ca4b2f0f98756d2bf49`
`font_01_sfnt_off00009151.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9151	11464 bytes
SHA-256: `a47046566b01e0a80e349708c3db343b2cd01adbf80dabdd98fe4f864136c8cf`

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