Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee61cfe0368cfe46…

MALICIOUS

PDF

84.4 KB Created: 2021-04-27 22:36:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 849178d706c47d5c430dc77e8850d6c7 SHA-1: 33d019f84fc05b8f9121614a8fcbe84b18792992 SHA-256: ee61cfe0368cfe46aa90b32a0b13e80afa1cb08b54632b949437c44174a436bf
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/strik?utm_term=where+can+i+buy+torps PDF link annotation
    • http://tegeboxurogon.iblogger.org/pajimogexi.pdfIn PDF document text
    • http://naturfresh.space/8d_structured_problem_solving_second_edition74w4n.pdfIn PDF document text
    • https://vuzavadakugodo.weebly.com/uploads/1/3/4/8/134857872/mifidegiw-zimazumifimim-marufubasu.pdfIn PDF document text
    • http://gatorama.space/regular_verbs_list_with_spanish_translationtne89.pdfIn PDF document text
    • http://uniques.space/mivomepamiwimagimitofelembp1se.pdfIn PDF document text
    • http://boost-store.net/32950775609k9ihe.pdfIn PDF document text
    • https://fidumozif.weebly.com/uploads/1/3/4/7/134715024/e2d5742bb86a9.pdfIn PDF document text
    • https://nifabixiguwo.weebly.com/uploads/1/3/5/2/135295020/sameje_zitagometiroj_tedubagosevap_kojizuvener.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujovitefazi.rf.gd/15720732513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f78d1dbe-900b-4619-abd4-d8ebb78bab7b/18329654117.pdfIn PDF document text
    • http://sabofakulivibav.epizy.com/business_writing_today_a_practical_guide_download.pdfIn PDF document text
    • http://jatujij.rf.gd/58170258882.pdfIn PDF document text
    • http://latilofu.rf.gd/facial_pore_cleansing_brush_manual.pdfIn PDF document text
    • https://3682d434-6e27-4ac8-9ac2-d3ec24fa429c.filesusr.com/ugd/9b5f63_b70cf0859eba43baaf7cce09a444cdeb.pdf?index=trueIn PDF document text
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_880551b368cf4a508a82698982eaf2a1.pdf?index=trueIn PDF document text
    • http://kunizifafam.epizy.com/ordering_numbers_worksheet_ks1.pdfIn PDF document text
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_591f489e6a7e468e87fb39ae52aacbf6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded6416f-d4c8-4a0d-8f6a-72a7d62902f4/57050905232.pdfIn PDF document text
    • http://zisunajupanege.rf.gd/23801048607.pdfIn PDF document text
    • http://juxudawalugevop.epizy.com/intellij_generate_getters_and_setters_template.pdfIn PDF document text
    • http://zenutetuzobo.epizy.com/effect_of_climate_change_on_agricultural_production.pdfIn PDF document text
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_4bba71a507384bc883129af24c572a41.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
    • 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_off0000f5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DF 5244 bytes
SHA-256: fe55008e326264bf5b9387bc13fca9892192e9d5c52980360d730ce12f4a3153
font_01_sfnt_off000107c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C0 11336 bytes
SHA-256: 67f98df31d4f4d629eae8007063dcc8aff7929793153153fff537861139b0b9f
font_02_sfnt_off00012eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB9 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501