Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b8a45fade23a15…

MALICIOUS

PDF

73.5 KB Created: 2021-03-24 15:01:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8728076b84c317069bfd481db21d2dbe SHA-1: 4b73a35e4133d415bfd85773176bd08b564b6c84 SHA-256: d2b8a45fade23a15eb1e95a263915451271d35d1e90a7ea81e1b91c8b7bbc231
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://soxebez.ru/award?keyword=napoleon+bonaparte+pdf+download PDF link annotation
    • http://zifasito.22web.org/samsung_galaxy_note_4_cases_australia.pdfIn PDF document text
    • https://lakerevuko.weebly.com/uploads/1/3/4/6/134654656/1283178.pdfIn PDF document text
    • https://xiwabedosebu.weebly.com/uploads/1/3/1/3/131398066/wulafefiruparos.pdfIn PDF document text
    • https://fezabukife.weebly.com/uploads/1/3/5/3/135345753/2d9662ff17.pdfIn PDF document text
    • https://duruzamuxe.weebly.com/uploads/1/3/2/3/132302842/wepuguporok.pdfIn PDF document text
    • https://mitafomanamo.weebly.com/uploads/1/3/0/9/130969747/a129a.pdfIn PDF document text
    • https://suwekamepegatir.weebly.com/uploads/1/3/2/6/132682685/mufunolopag_napekufore_nutuviv.pdfIn PDF document text
    • https://pegepujime.weebly.com/uploads/1/3/1/4/131453637/rejokosovefolugok.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/donukadizolin/trigonometry_formula_sin_cos_tan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28ce7390-07a8-4430-873b-a41f2342f7a2/black_and_decker_le500_edger_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3501223-9523-4ee2-8680-1663dc4fe4dc/do_they_still_make_kerosene_heaters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89d68727-8a05-49f4-9627-ba827ba29549/xatubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fdb6f7c-9623-4e47-973d-aa156ad9c8e2/does_jason_die_in_trials_of_apollo_book_3.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/xenabijib.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/95315053479.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/xufosazojenur.pdfIn PDF document text
    • http://roxigivakupumun.epizy.com/vededeg.pdfIn PDF document text
    • http://zavalexudar.epizy.com/kipipesironuve.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_off0000d577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD577 4796 bytes
SHA-256: dee75194f7d02c58189e0180327eb76734b59881433709d620f0d1694e7e3c1f
font_01_sfnt_off0000e5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D6 10892 bytes
SHA-256: 65cda5f32e7bdd44894cd769be2f25dd26ef4207181adf2ac5515282f4a96743
font_02_sfnt_off00010b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B16 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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