Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14f2bdfc930fa85…

MALICIOUS

PDF

107.6 KB Created: 2021-06-03 07:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f52b6f24339f77845989fe21789e6ec4 SHA-1: 104854a6743f8000dbb0e07c5f4d702e9903fcde SHA-256: e14f2bdfc930fa853fc7e8eed6f964db0eb32b1e8e14fa220d23641fa88e7d2c
226 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. It uses a password-protected-archive lure. 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 0.9985

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://medvor.ru/pbw?utm_term=como+hacer+un+resumen+de+un+libro+sin+leerlo PDF link annotation
    • https://devigumekumowir.weebly.com/uploads/1/3/4/3/134394761/vakikole-gapurotelilaji.pdfIn PDF document text
    • https://rugajasaxi.weebly.com/uploads/1/3/4/0/134096424/werav.pdfIn PDF document text
    • https://morekifozolil.weebly.com/uploads/1/3/4/3/134332894/joweliloguxos_sewapireg_dumifevuzutijo_gewute.pdfIn PDF document text
    • https://niwitibu.weebly.com/uploads/1/3/1/6/131636677/fijal.pdfIn PDF document text
    • https://libakitaxejadeg.weebly.com/uploads/1/3/4/0/134096258/b32dd1c1be44d.pdfIn PDF document text
    • https://worojuwoxalo.weebly.com/uploads/1/3/0/8/130814432/vunezom-kawebiziv-zegatozomaxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472475/normal_5fcda425dbbff.pdfIn PDF document text
    • https://vojawozusuv.weebly.com/uploads/1/3/1/1/131164351/perer_lewepir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373241/normal_606851674a15d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c62e629-5df7-4ff7-8e62-dade31628540/can_x1_remote_control_tv_and_receiver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c707efef-86c5-4a34-b218-6aab03433a45/vifugiguref.pdfIn PDF document text
    • http://vowujepojez.pbworks.com/w/file/fetch/144427335/54254984990.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144418959/poliboloduwewonarodunozon.pdfIn PDF document text
    • http://juwelite.pbworks.com/w/file/fetch/144543447/brawl_stars_nulls_private_server_apk.pdfIn PDF document text
    • http://memofemovo.pbworks.com/w/file/fetch/144464019/adobe_illustrator_compatible_file.pdfIn PDF document text
    • http://barumena.pbworks.com/w/file/fetch/144445488/futefemukegogaxununa.pdfIn PDF document text
    • http://paderukut.pbworks.com/f/monthly_budget_planner_excel_format.pdfIn PDF document text
    • http://natutaliva.pbworks.com/f/gateway_2nd_edition_c1_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0a3b8f4-aac6-4b43-afd4-510ed7f41555/octavia_butler_dawn_movie.pdfIn PDF document text
    • http://nosiravuga.pbworks.com/f/chhota_bheem_aur_krishna_kirmada_full_movie_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a304aee-1829-4b9f-876e-578c674e3ef9/movaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41cb77fe-599f-4957-8f1a-c6bda30852ab/disney_world_code_of_conduct.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13290 6832 bytes
SHA-256: f6d8f0c111dd8b7acea4675c0ab710aee574dfbde482b739aef85f37a17f2c37
font_01_sfnt_off000143de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143DE 5224 bytes
SHA-256: c7ec8fb0fd5446bdb0caeef9f3533f69dc6c6e339c015915e9fcfd61dd73d64d
font_02_sfnt_off00015560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15560 1944 bytes
SHA-256: de5ab0c60cb3c322fa4b5ac3b76f3b2153b3606e7c880b2624fb1b6257133dd8
font_03_sfnt_off00015ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EA9 12772 bytes
SHA-256: 5eabbd60ffab3de43571e9ac0a3b22bde9b9c49b798057dd3cc5f0ce72a1aeb1
font_04_sfnt_off00018845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18845 16252 bytes
SHA-256: 6a8e9b2eca7e4412a06a914413072e3578c76ff5e4ba849553548f6c386f2080