Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ccb3ec41364b1d…

MALICIOUS

PDF

90.1 KB Created: 2021-03-30 05:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e1427c5c0b6c459d1a3a737b73ba8049 SHA-1: 204ae7ab9b709bd3798a271579723f00011b6098 SHA-256: 05ccb3ec41364b1deafc81b79a5fe4f30d5985a84e5c3303bb26989c5d3a3f32
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm designed to redirect users to malicious sites, with ClamAV identifying it as a phishing trojan. The embedded URLs, particularly 'fokemale.ru' and 'jijomaj.getenjoyment.net', are suspicious and likely serve as the initial landing pages for a phishing or malware delivery scheme. Although no scripts were explicitly extracted, the PDF structure and URL redirection heuristics strongly suggest an attempt to compromise the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/strik?utm_term=combining+like+terms+with+negative+coefficients+%2526+distribution+pdf PDF link annotation
    • http://jijomaj.getenjoyment.net/sixuvenakareraf.pdfIn PDF document text
    • http://securityverifiedservices.com/12080271649158nw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500432/normal_5fd7f8c6cd5db.pdfIn PDF document text
    • https://cdn.sqhk.co/lezebulodiw/jcfcgdI/28204674548.pdfIn PDF document text
    • https://cdn.sqhk.co/jiledexuda/3JKxihk/la_reina_del_sur_season_1_episode_1.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/wggidjb/81795236077.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496005/normal_6002f2c14534f.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/balancing_equations_worksheet_answers_1-20.pdfIn PDF document text
    • http://radogomi.mygamesonline.org/63408385129.pdfIn PDF document text
    • http://peuly.xyz/56711263215vxfyv.pdfIn PDF document text
    • http://nezowigivomi.scienceontheweb.net/63245842843.pdfIn PDF document text
    • https://cdn.sqhk.co/wemowubire/hgLkjaE/linezunane.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/vudivuzakal/novel_cecillia_wang.pdfIn PDF document text
    • https://997b2cc2-d96d-4654-b184-8a5d7ad473c0.filesusr.com/ugd/b8d08c_0e95db7bb4a94e0f8abb0b6fa584f604.pdf?index=trueIn PDF document text
    • https://ecfc1f44-6648-4072-bff5-6ee4adcfbe4f.filesusr.com/ugd/e5a943_62129325d19244c690580b6b5a453b59.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/gedutozinibezenetidexixil.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/jejumutulatomila.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/7011558609.pdfIn PDF document text
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_b327910a8735416590c60d14ea9a0d0f.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E54 5556 bytes
SHA-256: 999689391e6aa5249e66af9bed9a3f654a1f12becd85d37428a5c613780022da
font_01_sfnt_off0001312f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1312F 12112 bytes
SHA-256: 5ae9cf3e9ec4a6ec58a07d80d009190686da2daea4b6202481ae9138c1edcc58

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