PDF malware analysis — malicious · 998f3a055ed13a0c

MALICIOUS

PDF

95.5 KB Created: 2021-05-30 20:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 2a1bf4f5e504828eff5df8391f57a580 SHA-1: bde6e4b8feebd5efcf5986a3803eed8122ca5b83 SHA-256: 998f3a055ed13a0c0bdf97520919ce07ba873017019b8b04e9cdd1cb48620214

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document identified as malicious by a machine learning classifier and ClamAV. It contains an embedded URI pointing to 'https://zajinet.ru/123?utm_term=grade+2+math+worksheets+canadian+curriculum', which is likely a phishing or malware distribution site. The document body is heavily obfuscated, but the presence of the external URI suggests an attempt to redirect the user to a malicious resource, likely under the guise of providing educational content.

Machine Learning

Nyx PDF Classifier malicious score 0.9988

Heuristics 4

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://zajinet.ru/123?utm_term=grade+2+math+worksheets+canadian+curriculum PDF link annotation
- https://cdn-cms.f-static.net/uploads/4460946/normal_602519a47fe1e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4450506/normal_5fc7735dd49f5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485587/normal_602dcbb65790f.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4388407/normal_5fc88bcc3f38f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481662/normal_601844a2f0f2c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4500183/normal_60109012898d4.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4531626/normal_5feb60f5c946d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4393362/normal_5fef513f50992.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4477369/normal_600fa15add631.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4457868/normal_6002552c23300.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/cf04902a-b4aa-41c5-8dec-db4c2c9825d3/how_to_reset_cricut_expression_2.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a6ccce09-57af-4349-bff1-7ce8c91f2970/labijuv.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/013d9601-8b94-4254-820c-beab0dae1f0c/loledewopejerowa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5e4c9a60-771a-4efa-a5f8-d2f6f7b63a7f/physical_science_textbook.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e147d8c7-9d50-4863-954c-2fdcee61c5ec/wheel_horse_parts_uk.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5300e909-46c8-481c-8ab0-4994ab8af795/ranco_electronic_temperature_control_error_codes.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f0f81cd9-568d-4211-be6e-9be1841235fc/barnett_4x32_crossbow_scope_adjustment.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7499c625-3f18-4bb2-b69a-35935d791312/bakery_story_2_mod_apk_2019.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b9cf12fa-7e5d-4d9b-b03d-2da26d8cd855/data_communications_and_networking_5th_edition_solutions.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/201170ee-751f-4816-84cf-56ff75d33d89/g_shock_ga110gb-1a_battery.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/94aad41e-5663-4bfa-94aa-9b4819fb19ae/zatirage.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e5e4c701-4dc9-42b7-b349-b32e8f6a12b1/romoss_power_bank_instructions.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/304147df-f102-4adc-93a7-6e86c896500f/lineages_of_the_absolutist_state_review.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a1602a11-7cab-4957-b394-63e649799fcb/6771164447.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_off00012916.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12916	5380 bytes
SHA-256: `b50829e604b380c85032b3a643f7c5ad30cbf247d6cb31319e1346b29536c956`
`font_01_sfnt_off00013b51.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13B51	11728 bytes
SHA-256: `17eaf543a813dbc3314567a414eb492bb3f4b4c62da4a3ebddd3abb2508e1dd7`
`font_02_sfnt_off00016262.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16262	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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