Malicious PDF — malware analysis report

Static analysis result for SHA-256 5921493a5da96251…

MALICIOUS

PDF

78.6 KB Created: 2021-05-21 16:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ba952e50d5fb1e774be2978c0e3a76be SHA-1: 709beafd638ed7c14bcd071beb493af9bee892f0 SHA-256: 5921493a5da96251de992817d12271df208b20a8a76f7ede74708730dd96baa8
216 Risk Score

Malware Insights

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

The PDF contains a link farm and impersonates eBay, strongly indicating a credential phishing attempt. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of external URIs and the phishing lure suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sojujigun.weebly.com/uploads/1/3/0/9/130969910/vokifam-kulubodamex.pdf.
  • 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://resalured.ru/strik?utm_term=cracked+fortnite+accounts+generator PDF link annotation
    • https://sojujigun.weebly.com/uploads/1/3/0/9/130969910/vokifam-kulubodamex.pdfIn PDF document text
    • https://takibuvekinapix.weebly.com/uploads/1/3/4/4/134456834/83700241d501b7.pdfIn PDF document text
    • https://lizoxezubim.weebly.com/uploads/1/3/0/7/130776499/nanoxajuf-tusorobema-gotumun.pdfIn PDF document text
    • https://wegudogixudefup.weebly.com/uploads/1/3/1/4/131438345/vomarigozovubiduw.pdfIn PDF document text
    • https://vuwawirekexaz.weebly.com/uploads/1/3/0/9/130969699/pilewesopuwijag.pdfIn PDF document text
    • https://juvivufoli.weebly.com/uploads/1/3/5/3/135325295/5978293.pdfIn PDF document text
    • https://serirufudo.weebly.com/uploads/1/3/4/7/134712976/feca6397.pdfIn PDF document text
    • https://bijesuvudapij.weebly.com/uploads/1/3/1/8/131860553/1108042.pdfIn PDF document text
    • https://xesapexoxes.weebly.com/uploads/1/3/4/6/134633169/wifedejitinenuneveb.pdfIn PDF document text
    • https://xuvifadeto.weebly.com/uploads/1/3/2/6/132682806/wojema-tukedape-pikobowefago.pdfIn PDF document text
    • https://xabejelowubi.weebly.com/uploads/1/3/2/6/132695530/xojibafutafexeve.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lupebesu/18717922911.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/bridal_mask_eng_sub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc0ee2f6-a21e-48c5-9e60-f8e9313fa066/zidebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/907d97a7-9859-4701-8c47-4f7ee86a8928/little_shop_of_horrors_musical_audrey.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/bluecoats_jagged_line_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/684051ab-6042-4b50-aad1-61d7d6d40e2b/autoridad_espiritual_watchman_nee_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/about_you_ncs.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/65903358108.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/dalibukalesatimaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b954985c-ca7d-4be2-b902-ee6ecb1c8f06/78689556300.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/how_to_tell_valuable_marbles.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/46678357804.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A9 5124 bytes
SHA-256: f21d39fb151af310c10723213cf1f8d23e6f7dfbd73a18c961f494b1fb10b30f
font_01_sfnt_off0000f226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF226 10496 bytes
SHA-256: 3a1204f5a319c59924ac0019bd49d43474f397a154f9753392b84bdf8cca264e
font_02_sfnt_off0001165c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165C 16460 bytes
SHA-256: 066bee5985cf97627ae58cabbddf9ee9e32b20ed2ba34c0307524280b6b3a52a