PDF malware analysis — malicious · b44e527bf8ab5e36

MALICIOUS

PDF

80.4 KB Created: 2021-05-28 23:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 276a3e6777ccbe6d40e56cea279b0dac SHA-1: 966d8081f1fd283ee6f08b326c8ba2fd7ac5f313 SHA-256: b44e527bf8ab5e36798db319155ba5fa418c5f4495fc8489e1b7707d825f2f39

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://xajibur.ru/strik?utm_term=poemas+en+lengua+nahuatl+y+su+traduccion+en+espa%25C3%25B1ol+cortas PDF link annotation
- https://static.s123-cdn-static.com/uploads/4366364/normal_5ff0ed23a922e.pdfIn PDF document text
- https://pesadoxemanuz.weebly.com/uploads/1/3/4/8/134852899/6a65126b989d107.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4407724/normal_5fcf588b2931b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4498971/normal_6031125ee4044.pdfIn PDF document text
- https://muxolebutelun.weebly.com/uploads/1/3/2/7/132741382/xinodojobuvigitelejo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372735/normal_6029cc47c3ff6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388432/normal_6025c27b1692e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4494891/normal_5ff298d0ae338.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4481154/normal_5ffa62bc80bab.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4492892/normal_603a67b01e5ae.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4404514/normal_5fed9fc5ce9ce.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://uploads.strikinglycdn.com/files/9b3bb0e7-f541-4cb8-9745-5c0040ecc919/7_chakras_in_human_body_and_their_meaning.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ff805578-0b59-4359-a488-c84d634eee83/the_walking_dead_graphic_novels_volumes.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ccfa0a08-cdce-443d-8c03-e882a571adf9/how_much_human_trafficking.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7962713b-524a-46ef-a9ba-a584f5f09d86/2020_1_oz_american_gold_buffalo_coin_bu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/125fb504-cab6-4f1a-a7e9-227be7785ed3/what_are_some_examples_of_how_folk_cultures_approach_certain_foods.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/95b880c6-6272-4c19-92d2-809de0b08df3/20625640506.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/652a69dd-30a7-45b1-968d-b9b6e15575e7/craftsman_1_2_hp_garage_door_opener_light_doesnt_working.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a87d5965-e4ef-4876-8d72-668671a2af75/44756925908.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/49f1454c-f73d-43ba-bfae-bd69fff7b842/88920267225.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/65a395c0-e9b4-48da-9719-833b50db864f/44018835785.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f436392d-3a14-40a6-ac6b-8873fc2e839b/how_to_test_pressure_transducer_with_multimeter.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_off0000e7c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7C0	5684 bytes
SHA-256: `d891123fe4a1139f4047e9737c173c9857bd72867bb03f15f5dc5e267ac316e6`
`font_01_sfnt_off0000faa6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAA6	12456 bytes
SHA-256: `d27be6927ce256474e0cb5ade65aa97f6112e9839f1e63015402b5ef85656325`
`font_02_sfnt_off000122e0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x122E0	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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