Malicious PDF — malware analysis report

Static analysis result for SHA-256 658660c445f867ea…

MALICIOUS

PDF

83.0 KB Created: 2021-03-06 21:48:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: e5ac5f4b12f814261dcf37842ed38da3 SHA-1: 3860894da4dcd3528daf068a63aeaca52f3df32e SHA-256: 658660c445f867ea268e6c49161b2bd1a5c47e4116ee985620c9244823f28eea
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which are hosted on disposable domains or use UTM parameters, indicating a link farm or phishing attempt. The document body, though heavily obfuscated, suggests a lure related to 'horror short film script in hindi pdf'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=horror+short+film+script+in+hindi+pdf PDF link annotation
    • http://vikorurapufor.iblogger.org/bidodusimowajudelodo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/b16da863-c725-4d9a-bea4-938ce1791fdb/47840057666.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/zodukaxup.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/samsung_55q6fn_55_inch_ultra_hd_4k_smart_oled_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18527144-5efd-4d66-9750-8b9350bc3427/99059843591.pdfIn PDF document text
    • http://mapulikilep.epizy.com/how_do_teachers_pay_teachers_create_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/pdf_apocrypha_bible.pdfIn PDF document text
    • https://e1cd7dcf-8988-4be8-9b1a-722367337987.filesusr.com/ugd/6203b9_b2071d1913944f45aca3ea68ccb3a2be.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/heer_badnaam_song_whatsapp_status.pdfIn PDF document text
    • http://xuramilipadig.rf.gd/16601205700.pdfIn PDF document text
    • http://pawegafed.rf.gd/43531341188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0e38515-a310-415e-8041-53ec0f801606/stanley_garage_door_replacement_panels.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/green_screen_video_recorder_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f24989ed-e30c-4fb0-a9bd-6f8d52c4c64c/rhetorical_grammar_for_expository_reading_and_writing_module_2_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5534bece-e169-4f0b-ae94-2b7c74b8efad/20689921505.pdfIn PDF document text
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_a90f6f5460ee468db3be0e6e7ce4a210.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6295dde9-9d6d-4c4e-9c59-096de82252b0/kebedekapubasomolewo.pdfIn PDF document text
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_00eb9c4f477740bb8bba852f9613d8b1.pdf?index=trueIn 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.

FilenameKindSourceSize
font_00_sfnt_off0000ed8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8F 5144 bytes
SHA-256: 811651484778561f5be9235b8f950ee235d9a4d53643a5e2945db69c67673830
font_01_sfnt_off0000fee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE9 10836 bytes
SHA-256: 6651ed5cbaa3ad428877f04469d2cad97583614de45c46ba4766680a6a103127
font_02_sfnt_off00012406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12406 7916 bytes
SHA-256: 29bf92bcc0e7f2c3c304d2a6008b484a2fc84a5a8ecdf25f104b226fa10b6c9d