Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6e1bac3a5aabcdd…

MALICIOUS

PDF

69.7 KB Created: 2021-02-08 21:29:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ec1758e0828427bf6a8e66cc13f1763b SHA-1: e5bf586d8dabe00ab9f35fca68e788bdcb295bbd SHA-256: a6e1bac3a5aabcddea36ff54f324410236bcb2b553cb2d7903fa7a133e369c9f
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, many of which are identified as malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the structure and embedded links suggest a phishing lure designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=bhageeratha%20naa%20songs In PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/bleacher_report_nfl_picks_201902qm3.pdfIn PDF document text
    • http://pe50off.info/account_sheet_in_exceluq31r.pdfIn PDF document text
    • http://testersairf.xyz/33818380374ddouz.pdfIn PDF document text
    • https://sinipipa.weebly.com/uploads/1/3/0/8/130874509/2306520.pdfIn PDF document text
    • http://organicsss.space/principles_of_development_wolpert_onlineax34e.pdfIn PDF document text
    • http://znasila.ru/64154167996jcnct.pdfIn PDF document text
    • http://alteramaks.world/farid_al-_din_attaruplg4.pdfIn PDF document text
    • http://vsedlyatebya.xyz/materiales_aislantes_electricosh21di.pdfIn PDF document text
    • http://mabay.fun/62113639657gsuez.pdfIn PDF document text
    • http://batmbatm.ru/bifajezejimy7smu.pdfIn PDF document text
    • http://znakomstva18x.site/fatogoz2ie7k.pdfIn PDF document text
    • http://itdomen.fun/xefabufax824ni.pdfIn PDF document text
    • http://ibkreactiva2020.com/bloom_and_lahey_chartl1wkb.pdfIn PDF document text
    • http://car-test.pro/91382211186vlrbm.pdfIn PDF document text
    • http://paksorond.xyz/89848480893ubala.pdfIn PDF document text
    • http://meetsoda.club/jixexibazuprdqx4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gawabog/coaching_log_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/canning_vale_college_uniform_shop.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/vidmate_hd_er_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/egypt_powerpoint_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC792 4704 bytes
SHA-256: 2dc375d280abfd3c1c2a01f4cb7ce9e9ac99766cb02e85c5cfe5c18b3b2d26db
font_01_sfnt_off0000d77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77B 10620 bytes
SHA-256: 38a7fd5fd4f7d3354e5e4066dfe83d477f38381cda39e5a05d0caa7e03b01ccc
font_02_sfnt_off0000fb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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