Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c25537ac665960d…

MALICIOUS

PDF

74.1 KB Created: 2021-05-22 06:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: adeeb6444bcf280e0b3da32eebc97245 SHA-1: ede9978ef15790ca06b0e7158710098212ae467e SHA-256: 8c25537ac665960da43c6679a2db710aa5be921acc054f5d006ea5c93c9249ff
156 Risk Score

Malware Insights

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

This PDF document contains numerous external links, with one prominent URL leading to a site that appears to be part of a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://kuzutuzo.ru/strik?utm_term=newark+airport+weather+10+day+forecast PDF link annotation
    • https://pekatube.weebly.com/uploads/1/3/5/3/135393066/3836c488.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/fd9338a0e9e01.pdfIn PDF document text
    • https://lefiluke.weebly.com/uploads/1/3/4/8/134887161/3115343.pdfIn PDF document text
    • https://muxupodijem.weebly.com/uploads/1/3/4/8/134885552/2851653.pdfIn PDF document text
    • https://xikixunajaxata.weebly.com/uploads/1/3/5/9/135959014/456796.pdfIn PDF document text
    • https://dajoromu.weebly.com/uploads/1/3/4/3/134309711/6075039.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xokebore/sql_server_binary_checksum_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/ben_ten_alien_force_vilgax_attack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/gukapetetebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bdc35a7-c95a-4e5e-8e9e-ffb5352ac8a6/alan_watts_quotes_goodreads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc6415d8-7463-481f-90f9-797e74631e51/sudevugosid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc2b3626-5277-4b20-9353-5b4b8398fb9b/zobuxixobo.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/tipukufemilevaviri.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/conjunction_so_and_because_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/christs_college_sunderland_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/how_to_reboot_zebra_printer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ae4ee4-35d5-4fe8-baa5-0e3fc96d6ee9/98031339828.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/black_and_decker_cmm1200_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/40078110027.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/85344278881.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/free_template_for_curriculum_vitae.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/eureka_multi_cyclonic_vacuum_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3e1558d-a989-41d5-9780-419ab8447d08/32375709409.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE456 5632 bytes
SHA-256: ceed25c8312278a81b697089e89dc1099048e2c00585cc44d00520e60a10a487
font_01_sfnt_off0000f7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A5 10332 bytes
SHA-256: 3ca1e11df1f05826448dde117cc0bb6a535e28cbbf12ca99840610fe9eb3719a

Open this report in the interactive analyzer, or submit your own file for analysis.