Malicious PDF — malware analysis report

Static analysis result for SHA-256 219a348394815878…

MALICIOUS

PDF

95.3 KB Created: 2021-03-16 22:17:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0b3e20a095dfaf4ca34a4861525cb579 SHA-1: e5f6390f3a66340de725bebdbc636467dd1ad5e3 SHA-256: 219a3483948158780660e25a37aaf33b29705cf0bd8696687a95b68403aeb851
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, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and extensive URL usage are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/wix?keyword=principal+parts+of+verbs+worksheets+with+answers PDF link annotation
    • https://noselokegikol.weebly.com/uploads/1/3/4/3/134347285/sigagotu.pdfIn PDF document text
    • https://zuriloteva.weebly.com/uploads/1/3/4/6/134623588/c5a3e.pdfIn PDF document text
    • http://noxogejukebe.mypressonline.com/hospital_cahps_survey.pdfIn PDF document text
    • http://zuxuvikewi.sportsontheweb.net/causes_of_overpopulation_in_pakistan.pdfIn PDF document text
    • https://fofifakexetag.weebly.com/uploads/1/3/4/3/134345684/7decfe08d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://banigigafizaje.epizy.com/how_long_do_lg_refrigerators_last.pdfIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_0b20e5272ba8423c99975af802888873.pdf?index=trueIn PDF document text
    • http://buxupuputowase.rf.gd/fairbairn-sykes_fighting_knife_buy_uk.pdfIn PDF document text
    • http://witesenigo.atwebpages.com/syma_x8g_camera_not_working.pdfIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_e5296fc367d14cf6b4cc69fdb4e5e43b.pdf?index=trueIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_6ca93adf558f4224aa643485a0a8d679.pdf?index=trueIn PDF document text
    • http://durumam.epizy.com/96911442891.pdfIn PDF document text
    • http://samajusinifako.atwebpages.com/15610028568.pdfIn PDF document text
    • https://cb71deac-5427-4a11-aec2-6feec017c243.filesusr.com/ugd/4cd983_87b8dca88e054283ab0d7136b1c4b673.pdf?index=trueIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_a22bb25912494010a7bb7e79e78d678c.pdf?index=trueIn PDF document text
    • http://mobotifiriw.epizy.com/draw_io_templates.pdfIn PDF document text
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_c2704e97e8b14a6bb7cf7aadb3ff3695.pdf?index=trueIn PDF document text
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_7ced9c5896c8403eaafdd36e189e8fe3.pdf?index=trueIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_ff8c578fda0e4f1aba2e88ffc62e75b0.pdf?index=trueIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_a069af2471064a738b5e028405a03ad0.pdf?index=trueIn 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_off000124a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A7 4648 bytes
SHA-256: e65e2a36a1798d016ce92ff149c5c595f079ed33fffe53e3e7a56dabaa06a398
font_01_sfnt_off000134fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134FC 5460 bytes
SHA-256: 791be934d99f8a0ececd02074c414a2de68794d124e9b1411431dafe5489161f
font_02_sfnt_off0001479c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1479C 12372 bytes
SHA-256: 7a00b52ee154b7f7eef71eb4f40d6d55d42b47d06a35b6e7e874f3a3a3efb846