Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5e7ea3ce076294…

MALICIOUS

PDF

75.7 KB Created: 2021-03-11 06:30:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 00f1dcf7154b54647c9c73b0b4df95dd SHA-1: 253b27249cb9f10d524716e8b18e2dc89c045794 SHA-256: ee5e7ea3ce076294001462c83a1da9730a8cece89708453cdf72f301ab25aeca
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains multiple embedded URLs, with at least one, https://xezojetit.ru/wb?keyword=the%20bell%20jar%20sparknotes%20chapter%209, pointing to a suspicious domain that appears to be part of a link farm. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM further suggests the document is designed to host disposable links on potentially malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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/wb?keyword=the%20bell%20jar%20sparknotes%20chapter%209 PDF link annotation
    • http://vnatural.space/42776741929ua2sq.pdfIn PDF document text
    • http://cleaner360.shop/ssr_125_pit_bike_manual_for_sale4iogl.pdfIn PDF document text
    • http://vedakedudeloko.22web.org/podososokubaxozu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474720/normal_5fd7b5ee9ed5c.pdfIn PDF document text
    • http://nudistoff.club/787679416472bti8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489054/normal_604968cde0f0b.pdfIn PDF document text
    • http://mnatural.space/58071178726w3lis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378843/normal_603a7f22582cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469831/normal_6037b457a49d5.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/e8f5ad4e-1bf7-46e2-b7fe-04127b6fce15/excellence_playa_mujeres_cancun_honeymoon.pdfIn PDF document text
    • http://wuzugimekiwetad.epizy.com/contractor_agreement_template_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5ca9489-e329-422d-8ce6-85144a0fd97c/20069105629.pdfIn PDF document text
    • http://penabak.epizy.com/tuvizazi.pdfIn PDF document text
    • http://nowaginog.epizy.com/katifalaxirexuz.pdfIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_b1005cfc7bcd464f816536ea06433437.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/trolls_invitations_templates_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39fd9217-a4e2-497c-b2fc-e1a42f40aee6/18640319279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96c8fc22-a87a-4a02-b3f0-e7ca3ab7531a/63926033736.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/consumer_reports_home_insurance_ratings_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/sitezozegigiwazobaxefanel.pdfIn PDF document text
    • http://pixutuvaw.rf.gd/best_yin_yoga_poses_for_back.pdfIn PDF document text
    • https://45ed8376-e832-497f-ab20-0a31924dc5db.filesusr.com/ugd/4b7290_400430832c24430b9c4bdf4040f3d2fe.pdf?index=trueIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_f14af410ac8d4d01a2c542e7848cd176.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9766749-d15f-42c3-b320-8b4bdbe75711/1984_toyota_pickup_frame_repair_kit.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC70 5404 bytes
SHA-256: 30bcc50ec128c36c813c7edb8d8a081c5ff6c49d407cae8534c5eb0f93dff322
font_01_sfnt_off0000fec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC3 10160 bytes
SHA-256: b6c47c8b928234f71ee3b193c9c1f46ce1645576a2872e43b4b5e121465eb8ea