PDF malware analysis — malicious · 75c91cf80dbcb326

MALICIOUS

PDF

100.6 KB Created: 2021-05-25 17:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 71d7bd445c5c3c03d2f40c3989eaea90 SHA-1: bb4fe423509f82f9cfd9d18b62ab97725b179668 SHA-256: 75c91cf80dbcb3266147d713acd1e56df1e6457a19c81d2b9e565f1b9f8ffaf3

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 0.9996

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://fokemale.ru/strik?utm_term=evaluation+report+meaning+in+urdu PDF link annotation
- https://motutipe.weebly.com/uploads/1/3/4/6/134674000/448e6ec.pdfIn PDF document text
- https://busedulaxuxelo.weebly.com/uploads/1/3/1/3/131379622/logedosoritom.pdfIn PDF document text
- https://kefavemi.weebly.com/uploads/1/3/4/0/134042724/rudadilesefode-vizumiza.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/a2e6325f-b67f-4f6f-a6f7-06c826e71609/can_i_download_microsoft_office_on_chromebook.pdfIn PDF document text
- https://s3.amazonaws.com/daraniwekamidir/xedefa.pdfIn PDF document text
- https://s3.amazonaws.com/jiguwuzobozobaz/wow_classic_horde_lockpicking_guide.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/506f5050-6f78-4f92-b673-a8a5eafea4c8/tukeganujibobanituturolu.pdfIn PDF document text
- https://s3.amazonaws.com/posufij/signos_y_sintomas_de_una_fractura.pdfIn PDF document text
- https://s3.amazonaws.com/sazariwapa/silazibudurebe.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a7fb0e1c-8f93-43d9-927b-97d67074307c/1869664743.pdfIn PDF document text
- https://s3.amazonaws.com/jinotugiwomo/4906781125.pdfIn PDF document text
- https://s3.amazonaws.com/nilafafakem/4648357643.pdfIn PDF document text
- https://s3.amazonaws.com/zetubakuz/captain_underpants_names_of_characters.pdfIn PDF document text
- https://s3.amazonaws.com/xumakomowi/famous_quote_franklin_d_roosevelt.pdfIn PDF document text
- https://s3.amazonaws.com/dugibabafod/year_4_maths_symmetry_worksheets.pdfIn PDF document text
- https://s3.amazonaws.com/jifesu/23100159532.pdfIn PDF document text
- https://s3.amazonaws.com/lixuduwonifa/how_many_spell_slots_do_warlocks_get.pdfIn PDF document text
- https://s3.amazonaws.com/kodipopujufipig/polaris_360_pool_parts.pdfIn PDF document text
- https://s3.amazonaws.com/xelimewat/character_education_worksheet.pdfIn PDF document text
- https://s3.amazonaws.com/lixasifasi/captivate_for_instagram_free.pdfIn PDF document text
- https://s3.amazonaws.com/muvevanepen/rehras_sahib_path_download_djpunjab.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_off000140bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x140BB	5000 bytes
SHA-256: `7e53883828cd212d96f59079c3cf47f2a5142617cb5f30878d4cb69f7ad2ad14`
`font_01_sfnt_off000151a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x151A7	10972 bytes
SHA-256: `1ef47c49d009b061ed92b8d068747b354486c330f9ca499f9279135053b0dcbb`
`font_02_sfnt_off000176c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x176C2	4324 bytes
SHA-256: `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`

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