Malicious PDF — malware analysis report

Static analysis result for SHA-256 701eb3cc071c9ea8…

MALICIOUS

PDF

90.2 KB Created: 2021-06-01 10:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 631a7614979ab0339214e3f6aa636c5b SHA-1: e6205670d5f71b441e6a37066231abcad2ed409f SHA-256: 701eb3cc071c9ea85908fd3920e3e438001fb322c72a3ad3d6570ff59979cea6
186 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. 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 0.9994

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://wastran.ru/pbw?utm_term=do+calls+matter+in+mystic+messenger PDF link annotation
    • https://bezodidamivozel.weebly.com/uploads/1/3/2/6/132683328/maxoxuzijiw_setazadu_vuzizat_rujujeza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404116/normal_5ff3bd71d4b73.pdfIn PDF document text
    • https://wupibivuvofat.weebly.com/uploads/1/3/1/1/131164023/jesuboturupemana.pdfIn PDF document text
    • https://vevuwameran.weebly.com/uploads/1/3/0/9/130969214/ac30e71.pdfIn PDF document text
    • https://xonidaxu.weebly.com/uploads/1/3/4/3/134319292/finefogiwupazur_nituxepiruvumep_nivokirewi.pdfIn PDF document text
    • https://juxupadozimufa.weebly.com/uploads/1/3/4/3/134388451/xurenegep_sofozorikiro.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4424026/normal_60b4cc828eddd.pdfIn PDF document text
    • https://pomixorum.weebly.com/uploads/1/3/1/6/131606605/5198786.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390663/normal_604a65dbdbdd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_6032c9b7a5ccf.pdfIn PDF document text
    • https://dukilukisa.weebly.com/uploads/1/3/1/0/131070258/6079933.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/f215f543-2777-49f9-b8a0-fbc89edb9c55/how_to_connect_samsung_soundbar_to_tv_without_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83681567-408b-40d1-9c37-3f54fb73f149/rank_percentiles_league.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2727a1c8-40f0-48f1-85d1-ef0f37199ac2/najaxuxugumufobegida.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/w/file/fetch/144417654/novela_os_10_mandamentos_cap_60.pdfIn PDF document text
    • http://zewalar.pbworks.com/w/file/fetch/144446889/mecanica_de_materiales_fitzgerald_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3a4df2c-4ead-459a-a5a6-7396bf3649d1/7364610572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8209e11-2563-43f1-8944-8535183e954c/miwulobosirab.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/w/file/fetch/144446163/stickman_warriors_super_dragon_gift_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75ca7d25-5db3-42ee-9c5c-dd279d723504/gobesivigojibazodasifew.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144416556/what_is_an_output_force.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_off0000fe89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE89 3288 bytes
SHA-256: 89212e3ee011e2623b6bcae505bad8ec3061312f852b8824d6cc2f8eaa69f65d
font_01_sfnt_off00010a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4D 5220 bytes
SHA-256: f385a85ae6feebb49e014ab9e17aa08a9932b8fbb68c8ec4f25f7623ef4e384a
font_02_sfnt_off00011c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C09 12320 bytes
SHA-256: 96a09ef72d4605bb170c0db083d816cb6d8a11600375f317faa43485bc2c7a6b
font_03_sfnt_off000145bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145BF 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073