Malicious PDF — malware analysis report

Static analysis result for SHA-256 e95212ddd3b9aedb…

MALICIOUS

PDF

94.8 KB Created: 2021-03-15 01:59:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4369155298d86669c2a2a73ab9444b8a SHA-1: e187ca359b0e82dcf7e049f50733e470d06ac92d SHA-256: e95212ddd3b9aedb85616c296241ad7f33f35e40fbfecae24f788bcc40281df8
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a critical finding for brand-impersonation credential phishing, specifically impersonating Norton. The file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of a link to a redirector hosted on weebly.com further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://nunavupogo.weebly.com/uploads/1/3/4/4/134471291/rexovofal-pesoxavi.pdf.
  • 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://xezojetit.ru/wix?keyword=kissin+kate+barlow+story PDF link annotation
    • http://alcexpress1.xyz/76269661908v5zc0.pdfIn PDF document text
    • https://nunavupogo.weebly.com/uploads/1/3/4/4/134471291/rexovofal-pesoxavi.pdfIn PDF document text
    • http://tonerinkstore.com/frost_mage_azerite_armor_guide58v6m.pdfIn PDF document text
    • https://lebipogife.weebly.com/uploads/1/3/5/9/135990957/rajul-tosuxifum.pdfIn PDF document text
    • https://nefitajufu.weebly.com/uploads/1/3/4/7/134712437/nufarutefi_panituz_fumet_lufawaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_5fdc0cb087c93.pdfIn PDF document text
    • https://dodirubiv.weebly.com/uploads/1/3/4/5/134505429/nebelupojuraje-tuzitemawaduji-zikati.pdfIn PDF document text
    • https://gilibowipasumew.weebly.com/uploads/1/3/4/5/134578686/deroduzaxaxof-sunedugawega-kanuforoxabinom-visigeviwilawuk.pdfIn PDF document text
    • https://vepovipozo.weebly.com/uploads/1/3/4/4/134472033/rasutas.pdfIn PDF document text
    • http://mishgen.com/capitalization_worksheet_grade_1dd26i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370737/normal_602ede8de061b.pdfIn PDF document text
    • https://lewefuno.weebly.com/uploads/1/3/4/0/134041273/9ae616f85c34a8.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
    • https://uploads.strikinglycdn.com/files/bb55cf46-f860-40dc-8a84-4f1484e5f3c8/c_programming_software_free_download_full_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/951a829b-d05c-45e2-9f99-e4d8da7a07ea/which_mous_screen_protector_is_best.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/491dc3a2-2d4a-4c88-8f81-aaf569dcfcd2/storyboarding_template_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4087de3c-e8b3-422f-b7f9-b63ca4a82e9d/hibernate_tutorial_javatpoint_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6B 4836 bytes
SHA-256: 0ea387082ac8bb530ec666ff3819dc551b0bdbebc253d924b10f4724288f43ae
font_01_sfnt_off00013ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AE8 11456 bytes
SHA-256: adc71bf6e40ba432b6f248f79d2f7a85e412cb78b558c261056f2abf83ed068a
font_02_sfnt_off00016181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16181 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333