Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e3d63ddf04bf60…

MALICIOUS

PDF

85.0 KB Created: 2021-06-13 13:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1d4b3f9b435d2519fe34bfa0d479ee47 SHA-1: aa0935afbf5279befad95bbaf4f760e6498df75f SHA-256: e3e3d63ddf04bf606bbc031de6dc0d3799ce9556e117a821027e47017144283c
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • 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.
  • 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://crysiq.ru/pbw?utm_term=equation+with+two+points PDF link annotation
    • https://dixevivoruze.weebly.com/uploads/1/3/1/4/131437918/vigawekezowabexufut.pdfIn PDF document text
    • https://ramowofotaro.weebly.com/uploads/1/3/1/6/131607053/b0893d2.pdfIn PDF document text
    • https://guxipalun.weebly.com/uploads/1/3/1/8/131857363/zunukulovilumoxulek.pdfIn PDF document text
    • https://tuwavuko.weebly.com/uploads/1/3/5/3/135394323/36ed0.pdfIn PDF document text
    • https://lukofobetu.weebly.com/uploads/1/3/4/3/134317857/vosasenufezujefer.pdfIn PDF document text
    • https://repawuwo.weebly.com/uploads/1/3/5/3/135313919/5a26a49fce36613.pdfIn PDF document text
    • https://sifameduj.weebly.com/uploads/1/3/4/5/134522790/8664359.pdfIn PDF document text
    • https://bopazexujow.weebly.com/uploads/1/3/4/8/134876268/sevoziwawigufezis.pdfIn PDF document text
    • https://fimulumalopa.weebly.com/uploads/1/3/5/3/135326017/0075c.pdfIn PDF document text
    • https://xurarasetar.weebly.com/uploads/1/3/4/0/134096945/losifo_degelesijifaro_rinix_joketamum.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
    • http://vikowezanipe.pbworks.com/w/file/fetch/144585570/76172495499.pdfIn PDF document text
    • http://kinuwibe.pbworks.com/f/kinituxopurovarape.pdfIn PDF document text
    • http://biduzoku.pbworks.com/f/what_is_the_maximum_distance_that_the_ultrasonic_sensor_can_detect_an_object.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/w/file/fetch/144891165/avengers_theme_viola_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/287dabfa-bc6e-4d1d-851f-ab81db90d36c/is_the_epson_artisan_1430_a_sublimation_printer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da97b62c-0476-47f7-b7a1-f47ef34643dc/dd_miniatures_paint_set.pdfIn PDF document text
    • http://sapagujedok.pbworks.com/w/file/fetch/144993684/99904761970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/248ade18-b3ff-4b3f-b10b-42cc4c7a9f54/las_cronicas_de_narnia_pelicula_completa_en_castellano_online.pdfIn PDF document text
    • http://nubuzefi.pbworks.com/w/file/fetch/144534351/what_is_romantic_realism.pdfIn PDF document text
    • http://vinukena.pbworks.com/f/how_do_i_install_adobe_reader_on_vista.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c179ede-06cb-437d-9068-3a2ea4820a1c/mosanurunagijawomavuwem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7590afb7-6948-4811-94bc-8c51ba6b5400/beats_by_dre_solo_3_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1e28346-a12a-4e56-9885-bbc5965a08fd/94097126888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1775380c-80eb-422a-bbd1-d974dc78347d/34258430865.pdfIn PDF document text
    • http://sawebaz.pbworks.com/f/how_to_install_windows_drivers_manually.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB75 4720 bytes
SHA-256: 293d54f2dfcba1141d8c71fbe3d23c756e2cce01cb20a0e271bf625a9559042c
font_01_sfnt_off0000fb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB88 11464 bytes
SHA-256: b30ea8fd8db0a0f279601245437bcd577089da60b9d7262a503c6e4e86d00d81
font_02_sfnt_off00012326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12326 16096 bytes
SHA-256: 9853a4a918762215dfcba51349555ff48d39e56332efe18e2f333ca30d8a5b61
font_03_sfnt_off000137f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137F0 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378