Malicious PDF — malware analysis report

Static analysis result for SHA-256 748e1422f167b341…

MALICIOUS

PDF

94.1 KB Created: 2021-04-20 16:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3727ef949def507919a7f13e2b9109e5 SHA-1: 23e88c6ba5048ffeab62221ff714b77d888e786a SHA-256: 748e1422f167b341dac3917f3a54b091d934caa5a44818fc535b4a3a335cb0fe
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://fokemale.ru/strik?utm_term=2013+dodge+avenger+parts+diagram PDF link annotation
    • http://milanbeach.fun/11120767667ix6br.pdfIn PDF document text
    • http://popularchoice.space/rebupabulaxokimowpak6w.pdfIn PDF document text
    • http://twoup-viktoria.online/cyberpunk_2077_wallpaper_ultrawide0yonj.pdfIn PDF document text
    • http://vefuvowew.22web.org/aquaponics_books.pdfIn PDF document text
    • http://buzovanukoziba.22web.org/5703287059.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://forolulazo.rf.gd/galilean_moons_of_jupiter_lab_answers.pdfIn PDF document text
    • http://viropamel.rf.gd/zatevunovis.pdfIn PDF document text
    • http://jawamamabob.rf.gd/25949256032.pdfIn PDF document text
    • http://bovifuxabobi.epizy.com/mekiteraberiviziruganudu.pdfIn PDF document text
    • https://411563d6-f1a1-4768-9eaa-86e4eb1f1ae3.filesusr.com/ugd/6d8349_0058d8b1d9074ae8b74f1591ed95320c.pdf?index=trueIn PDF document text
    • http://favigagiwu.epizy.com/aramaic_bible_old_testament.pdfIn PDF document text
    • https://3ced707c-20bd-49bb-93f1-edb15be4e391.filesusr.com/ugd/e90305_5b594b3aa35d4977aa1d124eed2bad42.pdf?index=trueIn PDF document text
    • https://bdc3fad0-85dd-4e34-85f7-620d54d4ff6f.filesusr.com/ugd/10cedf_30951d9c71c443efb74c92674af267d8.pdf?index=trueIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_a232ba17a4f24be1aef5c107af8eff21.pdf?index=trueIn PDF document text
    • http://wapugabidojako.rf.gd/98182199474.pdfIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_70e27173a74149e5bcf76ea26fbdf4e3.pdf?index=trueIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_c6ec236ca25d4fdab9737c3da737ea1f.pdf?index=trueIn PDF document text
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_bb1b769f3be740f6ac48780e64177ef4.pdf?index=trueIn PDF document text
    • http://sufitinefa.epizy.com/multiplication_worksheets_year_8.pdfIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_a77944d6bc97499f83cf8eb2d83af483.pdf?index=trueIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_a8a6c1390b674fd9b51b7fb613e9b4ed.pdf?index=trueIn PDF document text
    • http://zozasozam.epizy.com/acoustics_in_architecture.pdfIn PDF document text
    • http://vorafudozef.rf.gd/liquido_amniotico_caracteristicas.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BC 5700 bytes
SHA-256: ef5f4cb87eb43677199b5aa6f444eaee76f79d9efab023d529ca1d8663297070
font_01_sfnt_off00012c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1B 11944 bytes
SHA-256: 2b206397e6fa22a598ef8e37922679fbd7c36be7250acd4b1a4687d059db87c0
font_02_sfnt_off00015413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15413 16060 bytes
SHA-256: ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833

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