PDF malware analysis — malicious · 74b2fbed145bdc96

MALICIOUS

PDF

42.0 KB Created: 2020-10-27 10:45:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: f7be5c5a9edcbd74f74c0ed209b19b72 SHA-1: 3709b54ac0807bdbd4d48876f87d250ddbaf478d SHA-256: 74b2fbed145bdc9689b52e33cb52873b4e37b19147b63f90458937c5f0d8ff58

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for an owner's manual, and the heuristic firings confirm the presence of malicious redirector links and a link farm. The ML classifier strongly indicates maliciousness.

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://gettraff.ru/strik?keyword=nuwa+hitchhiker+owners+manual In PDF document text
- https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/7984006.pdfIn PDF document text
- https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/ff06dfdf.pdfIn PDF document text
- https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/regopomasopugaw.pdfIn PDF document text
- https://tedomidile.weebly.com/uploads/1/3/2/7/132712102/bemin_zewomusuza_tubovedo.pdfIn PDF document text
- https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/zanadutut_wexudafenatogun_jetomefoja.pdfIn PDF document text
- https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/4540249.pdfIn PDF document text
- https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/1755068.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/kezemiradigu/topographic_map_worksheet_answer_key.pdfIn PDF document text
- https://s3.amazonaws.com/jamokaroxoj/big_fat_notebook_math.pdfIn PDF document text
- https://s3.amazonaws.com/fofeguj/important_years_in_indian_history_in_tamil.pdfIn PDF document text
- https://s3.amazonaws.com/nezanurugega/72186928501.pdfIn PDF document text
- https://s3.amazonaws.com/jamokaroxoj/sequence_and_series_bsc.pdfIn PDF document text
- https://s3.amazonaws.com/mijedusovineti/56960983394.pdfIn PDF document text
- https://s3.amazonaws.com/sojuravewi/cute_yearly_calendar_2019.pdfIn PDF document text
- https://s3.amazonaws.com/wilugugo/pirobakokukelixamaxuwirej.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d6bf8c1b-62e7-425e-88a7-0e3c8210d566/ludulegodegime.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/856637e9-f429-4234-9d92-f0a2c81e09f9/99292337694.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8611ba01-1a55-4fec-ac5b-23536523f753/8th_grade_alternative_energy_webques.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/af905dcf-8015-4dc5-8db3-86cf2675416c/22457974637.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5ca04764-70c4-4782-ba5c-2e8d44ace9d6/29685925753.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0343/6446/files/physical_education_ia_sample.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/0878/9150/files/internal_combustion_engine_download.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0503/6651/3312/files/6930405619.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0499/9918/4022/files/kufapovodos.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0482/8744/9250/files/galomasukubuta.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_off000055f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x55F2	5048 bytes
SHA-256: `1292e3bb3e74d5c5210a07d47c0abb88f6504be056116e56389ede80270501d3`
`font_01_sfnt_off000066f5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x66F5	11076 bytes
SHA-256: `b9889a726beef87dd95e7d2ae7756c689baa54434462c05df8d8cbc7f266b1ee`
`font_02_sfnt_off00008c4b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C4B	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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